SMTP settings

Tier: Free, Premium, Ultimate Offering: Self-managed

If you would rather send application email via an SMTP server instead of via Sendmail or Postfix, add the following configuration information to /etc/gitlab/gitlab.rb and run gitlab-ctl reconfigure.

caution
Your smtp_password should not contain any String delimiters used in Ruby or YAML (f.e. ') to avoid unexpected behavior during the processing of config settings.

There are example configurations at the end of this page. 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.server"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "smtp user"
gitlab_rails['smtp_password'] = "smtp password"
gitlab_rails['smtp_domain'] = "example.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

# If your SMTP server does not like the default 'From: gitlab@localhost' you
# can change the 'From' with this setting.
gitlab_rails['gitlab_email_from'] = 'gitlab@example.com'
gitlab_rails['gitlab_email_reply_to'] = 'noreply@example.com'

# If your SMTP server is using a self signed certificate or a certificate which
# is signed by a CA which is not trusted by default, you can specify a custom ca file.
# Please note that the certificates from /etc/gitlab/trusted-certs/ are
# not used for the verification of the SMTP server certificate.
gitlab_rails['smtp_ca_file'] = '/path/to/your/cacert.pem'

SMTP connection pooling

History

You can enable SMTP connection pooling with the following setting: 

gitlab_rails['smtp_pool'] = true

This allows Sidekiq workers to reuse SMTP connections for multiple jobs. The maximum number of connections in the pool follows the maximum concurrency configuration for Sidekiq.

Using encrypted credentials

History

Instead of storing the SMTP credentials in the configuration files as plain text, you can optionally use an encrypted file for the SMTP credentials. To use this feature, you first need to enable GitLab encrypted configuration.

The encrypted configuration for SMTP exists in an encrypted YAML file. By default the file will be created at /var/opt/gitlab/gitlab-rails/shared/encrypted_configuration/smtp.yaml.enc. This location is configurable in the GitLab configuration.

The unencrypted contents of the file should be a subset of the settings from your smtp_*' settings in the gitlab_rails configuration block.

The supported configuration items for the encrypted file are:

  • user_name
  • password

The encrypted contents can be configured with the SMTP secret edit Rake command.

Configuration

If initially your SMTP configuration looked like:

  1. In /etc/gitlab/gitlab.rb: 
  gitlab_rails['smtp_enable'] = true
  gitlab_rails['smtp_address'] = "smtp.server"
  gitlab_rails['smtp_port'] = 465
  gitlab_rails['smtp_user_name'] = "smtp user"
  gitlab_rails['smtp_password'] = "smtp password"
  gitlab_rails['smtp_domain'] = "example.com"
  gitlab_rails['smtp_authentication'] = "login"
  gitlab_rails['smtp_enable_starttls_auto'] = true
  gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

  1. Edit the encrypted secret: 

    sudo gitlab-rake gitlab:smtp:secret:edit EDITOR=vim

  2. The unencrypted contents of the SMTP secret should be entered like: 

    user_name: 'smtp user'
password: 'smtp password'
  3. Edit /etc/gitlab/gitlab.rb and remove the settings for smtp_user_name and smtp_password.

  4. Reconfigure GitLab: 

    sudo gitlab-ctl reconfigure

Example configurations

SMTP on localhost

This configuration, which simply enables SMTP and otherwise uses the default settings, can be used for an MTA running on localhost that does not provide a sendmail interface or that provides a sendmail interface that is incompatible with GitLab, such as Exim. 

gitlab_rails['smtp_enable'] = true

SMTP without SSL

By default SSL is enabled for SMTP. If your SMTP server does not support communication over SSL use following settings: 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = 'localhost'
gitlab_rails['smtp_port'] = 25
gitlab_rails['smtp_domain'] = 'localhost'
gitlab_rails['smtp_tls'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'none'
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_ssl'] = false
gitlab_rails['smtp_force_ssl'] = false

Gmail

note
Gmail has strict sending limits that can impair functionality as your organization grows. We strongly recommend using a transactional service like SendGrid or Mailgun for teams using SMTP configuration.
gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.gmail.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "my.email@gmail.com"
gitlab_rails['smtp_password'] = "my-gmail-password"
gitlab_rails['smtp_domain'] = "smtp.gmail.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'peer' # Can be: 'none', 'peer', 'client_once', 'fail_if_no_peer_cert', see http://api.rubyonrails.org/classes/ActionMailer/Base.html

Don’t forget to change my.email@gmail.com to your email address and my-gmail-password to your own password.

If you encounter authentication errors, ensure you have allowed less secure apps to access the account or try turning on 2-step validation and using an application password.

Google SMTP relay

You can route outgoing non-Gmail messages through Google using Google’s SMTP relay service. 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp-relay.gmail.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_domain'] = "yourdomain.com"
gitlab_rails['gitlab_email_from'] = 'username@yourdomain.com'
gitlab_rails['gitlab_email_reply_to'] = 'username@yourdomain.com'

Mailgun 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.mailgun.org"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_authentication'] = "plain"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_user_name'] = "postmaster@mg.gitlab.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "mg.gitlab.com"

Amazon Simple Email Service (AWS SES)

  • Using STARTTLS 
gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "email-smtp.region-1.amazonaws.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "IAMmailerKey"
gitlab_rails['smtp_password'] = "IAMmailerSecret"
gitlab_rails['smtp_domain'] = "yourdomain.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true

Make sure to permit egress through port 587 in your ACL and security group.

  • Using TLS Wrapper 
gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "email-smtp.region-1.amazonaws.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "IAMmailerKey"
gitlab_rails['smtp_password'] = "IAMmailerSecret"
gitlab_rails['smtp_domain'] = "yourdomain.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_ssl'] = true
gitlab_rails['smtp_force_ssl'] = true

Make sure to permit egress through port 465 in your ACL and security group.

Mandrill 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.mandrillapp.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "MandrillUsername"
gitlab_rails['smtp_password'] = "MandrillApiKey" # https://mandrillapp.com/settings
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true

SMTP.com

You can use the SMTP.com email service. Retrieve your sender login and password from your account.

To improve delivery by authorizing SMTP.com to send emails on behalf of your domain, you should: 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = 'send.smtp.com'
gitlab_rails['smtp_port'] = 25 # If your outgoing port 25 is blocked, try 2525, 2082
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_authentication'] = 'plain'
gitlab_rails['smtp_user_name'] = 'your_sender_login'
gitlab_rails['smtp_password'] = 'your_sender_password'
gitlab_rails['smtp_domain'] = 'your.gitlab.domain.com'
gitlab_rails['gitlab_email_from'] = 'user@your.gitlab.domain.com'
gitlab_rails['gitlab_email_reply_to'] = 'user@your.gitlab.domain.com'

Check the SMTP.com Knowledge Base for further assistance.

SparkPost 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.sparkpostmail.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "SMTP_Injection"
gitlab_rails['smtp_password'] = "SparkPost_API_KEY" # https://app.sparkpost.com/account/credentials
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true

Gandi 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "mail.gandi.net"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_authentication'] = "plain"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_user_name'] = "your.email@domain.com"
gitlab_rails['smtp_password'] = "your.password"
gitlab_rails['smtp_domain'] = "domain.com"

Zoho Mail

This configuration was tested on Zoho Mail with a custom domain. 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.zoho.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_authentication'] = "plain"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_user_name'] = "gitlab@mydomain.com"
gitlab_rails['smtp_password'] = "mypassword"
gitlab_rails['smtp_domain'] = "smtp.zoho.com"
gitlab_rails['gitlab_email_from'] = 'gitlab@example.com'
gitlab_rails['gitlab_email_reply_to'] = 'noreply@example.com'

SiteAge, LLC Zimbra Mail 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = 'mail.siteage.net'
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = 'gitlab@domain.com'
gitlab_rails['smtp_password'] = 'password'
gitlab_rails['smtp_authentication'] = 'login'
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['gitlab_email_from'] = "gitlab@domain.com"
gitlab_rails['smtp_tls'] = true

OVH 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "ssl0.ovh.net"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "username@domain.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "ssl0.ovh.net"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'none'

Outlook 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp-mail.outlook.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "username@outlook.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "smtp-mail.outlook.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

Office365 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.office365.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "username@yourdomain.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "yourdomain.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'
gitlab_rails['gitlab_email_from'] = 'username@yourdomain.com'

Office365 relay 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "your mx endpoint"
gitlab_rails['smtp_port'] = 25
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_domain'] = "yourdomain.com"
gitlab_rails['gitlab_email_from'] = 'username@yourdomain.com'
gitlab_rails['gitlab_email_reply_to'] = 'noreply@yourdomain.com'

Online.net 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtpauth.online.net"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "username@domain.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "online.net"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'none'

Amen.fr / Securemail.pro 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp-fr.securemail.pro"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "username@domain.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_tls'] = true

1&1 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.1and1.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "my.email@domain.com"
gitlab_rails['smtp_password'] = "1and1-email-password"
gitlab_rails['smtp_domain'] = "domain.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true

yahoo 

gitlab_rails['gitlab_email_from'] = 'user@yahoo.com'
gitlab_rails['gitlab_email_reply_to'] = 'user@yahoo.com'

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.mail.yahoo.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "user@yahoo.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

QQ exmail

QQ exmail (腾讯企业邮箱) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.exmail.qq.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "xxxx@xx.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['gitlab_email_from'] = 'xxxx@xx.com'
gitlab_rails['smtp_domain'] = "exmail.qq.com"

NetEase Free Enterprise Email

NetEase Free Enterprise Email (网易免费企业邮) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.ym.163.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "xxxx@xx.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['gitlab_email_from'] = 'xxxx@xx.com'
gitlab_rails['smtp_domain'] = "smtp.ym.163.com"

SendGrid with username/password authentication 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.sendgrid.net"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "a_sendgrid_crendential"
gitlab_rails['smtp_password'] = "a_sendgrid_password"
gitlab_rails['smtp_domain'] = "smtp.sendgrid.net"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false

SendGrid with API Key authentication

If you don’t want to supply a username/password, you can use an API key: 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.sendgrid.net"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "apikey"
gitlab_rails['smtp_password'] = "the_api_key_you_created"
gitlab_rails['smtp_domain'] = "smtp.sendgrid.net"
gitlab_rails['smtp_authentication'] = "plain"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
# If use Single Sender Verification You must configure from. If not fail
# 550 The from address does not match a verified Sender Identity. Mail cannot be sent until this error is resolved.
# Visit https://sendgrid.com/docs/for-developers/sending-email/sender-identity/ to see the Sender Identity requirements
gitlab_rails['gitlab_email_from'] = 'email@sender_owner_api'
gitlab_rails['gitlab_email_reply_to'] = 'email@sender_owner_reply_api'

Note that smtp_user_name must literally be set to "apikey". The API Key you created must be entered in smtp_password.

Brevo

This configuration was tested with the Brevo SMTP relay service. To grab the relevant account credentials via the URLs commented into this example, log in to your Brevo account.

For further details, refer to the Brevo help page. 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp-relay.sendinblue.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "<username@example.com>" # https://app.brevo.com/settings/keys/smtp
gitlab_rails['smtp_password'] = "<password>"              # https://app.brevo.com/settings/keys/smtp
gitlab_rails['smtp_domain'] = "<example.com>"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['gitlab_email_from'] = '<gitlab@example.com>'
gitlab_rails['gitlab_email_reply_to'] = '<noreply@example.com>'

SMTP2GO

This configuration was tested using SMTP2GO. To get the relevant account credentials using the URLs commented in this example, sign in to your SMTP2GO account. 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "mail.smtp2go.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "<username>"    # https://app.smtp2go.com/settings/users
gitlab_rails['smtp_password'] = "<password>"     # https://app.smtp2go.com/settings/users
gitlab_rails['smtp_domain'] = "<example.com>"    # https://app.smtp2go.com/settings/sender_domains
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true

Yandex 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.yandex.ru"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "login"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "yourdomain_or_yandex.ru"
gitlab_rails['gitlab_email_from'] = 'login_or_login@yandex.ru'
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

UD Media 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "mail.udXX.udmedia.de" # Replace XX, see smtp server information: https://www.udmedia.de/login/mail/
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "login"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

Microsoft Exchange (no authentication) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "example.com"
gitlab_rails['smtp_port'] = 25
gitlab_rails['smtp_domain'] = "example.com"
gitlab_rails['smtp_enable_starttls_auto'] = true

Microsoft Exchange (with authentication) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "mail.example.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "username@domain.com"
gitlab_rails['smtp_password'] = 'password'
gitlab_rails['smtp_domain'] = "mail.example.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true

Strato.de 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.strato.de"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "username@stratodomain.de"
gitlab_rails['smtp_password'] = "strato_email_password"
gitlab_rails['smtp_domain'] = "stratodomain.de"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'none'

Rackspace 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "secure.emailsrvr.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "username@domain.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "domain.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

gitlab_rails['gitlab_email_from'] = 'username@domain.com'
gitlab_rails['gitlab_email_reply_to'] = 'username@domain.com'

DomainFactory (df.eu) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "sslout.df.eu"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "username@domain.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "domain.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'none'

Infomaniak (infomaniak.com) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "mail.infomaniak.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "username"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "mail.infomaniak.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'none'

GoDaddy (TLS)

  • European servers: smtpout.europe.secureserver.net
  • Asian servers: smtpout.asia.secureserver.net
  • Global (US) servers: smtpout.secureserver.net 
gitlab_rails['gitlab_email_from'] = 'username@domain.com'

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtpout.secureserver.net"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "username@domain.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "domain.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true

GoDaddy (No TLS)

See GoDaddy (TLS) entry above for mail server list. 

gitlab_rails['gitlab_email_from'] = 'username@domain.com'

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtpout.secureserver.net"
gitlab_rails['smtp_port'] = 80
gitlab_rails['smtp_user_name'] = "username@domain.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "domain.com"
gitlab_rails['smtp_authentication'] = "plain"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = false

OpenSRS (hostedemail.com) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "mail.hostedemail.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "username@domain.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "domain.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

gitlab_rails['gitlab_email_from'] = 'username@domain.com'
gitlab_rails['gitlab_email_reply_to'] = 'username@domain.com'

Aruba (aruba.it) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtps.aruba.it"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "user@yourdomain.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "yourdomain.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_ssl'] = true

Alibaba Cloud Direct Mail (No TLS) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtpdm-ap-southeast-1.aliyun.com"    # Set to the Direct Mail service region in use, refer to: https://www.alibabacloud.com/help/en/directmail/latest/smtp-service-address
gitlab_rails['smtp_port'] = 80
gitlab_rails['smtp_user_name'] = "<username@example.com>"            # Direct Mail sender address
gitlab_rails['smtp_password'] = "<password>"                         # Set Direct Mail password
gitlab_rails['smtp_domain'] = "<example.com>"                        # Email domain configured in Direct Mail
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'none'
gitlab_rails['gitlab_email_from'] = "<username@example.com>"         # Email domain configured in Direct Mail

Alibaba Cloud Direct Mail (TLS) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtpdm-ap-southeast-1.aliyun.com"    # Set to the Direct Mail service region in use, refer to: https://www.alibabacloud.com/help/en/directmail/latest/smtp-service-address
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "<username@example.com>"            # Direct Mail sender address
gitlab_rails['smtp_password'] = "<password>"                         # Set Direct Mail password
gitlab_rails['smtp_domain'] = "<example.com>"                        # Email domain configured in Direct Mail
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['gitlab_email_from'] = "<username@example.com>"         # Email domain configured in Direct Mail

Aliyun Direct Mail

Aliyun Direct Mail (阿里云邮件推送) 

gitlab_rails['gitlab_email_from'] = 'username@your domain'
gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtpdm.aliyun.com"
gitlab_rails['smtp_port'] = 80
gitlab_rails['smtp_user_name'] = "username@your domain"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "your domain"
gitlab_rails['smtp_authentication'] = "login"

Aliyun Enterprise Mail with TLS

Aliyun Enterprise Mail with TLS (阿里企业邮箱) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.qiye.aliyun.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "username@your domain"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "your domain"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true

FastMail

FastMail requires an App Password even when two-step verification is not enabled. 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.fastmail.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "account@fastmail.com"
gitlab_rails['smtp_password'] = "app-specific-password"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

Dinahosting 

gitlab_rails['gitlab_email_from'] = 'username@example.com'
gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "example-com.correoseguro.dinaserver.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "username-example-com"
gitlab_rails['smtp_password'] = "mypassword"
gitlab_rails['smtp_domain'] = "example-com.correoseguro.dinaserver.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

GMX Mail 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "mail.gmx.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "my-gitlab@gmx.com"
gitlab_rails['smtp_password'] = "Pa5svv()rD"
gitlab_rails['smtp_domain'] = "mail.gmx.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

### Email Settings
gitlab_rails['gitlab_email_enabled'] = true
gitlab_rails['gitlab_email_from'] = 'my-gitlab@gmx.com'
gitlab_rails['gitlab_email_display_name'] = 'My GitLab'
gitlab_rails['gitlab_email_reply_to'] = 'noreply@gmx.com'

Hetzner 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "mail.your-server.de"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "user@example.com"
gitlab_rails['smtp_password'] = "mypassword"
gitlab_rails['smtp_domain'] = "mail.your-server.de"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
gitlab_rails['gitlab_email_from'] = "example@example.com"

Snel.com 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtprelay.snel.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_domain'] = "example.com"
gitlab_rails['smtp_authentication'] = false
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
gitlab_rails['gitlab_email_from'] = "example@example.com"
gitlab_rails['gitlab_email_reply_to'] = "example@example.com"

JangoSMTP 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "express-relay.jangosmtp.net"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_authentication'] = "plain"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_user_name'] = "your.username"
gitlab_rails['smtp_password'] = "your.password"
gitlab_rails['smtp_domain'] = "domain.com"
gitlab_rails['gitlab_email_from'] = 'gitlab@domain.com'
gitlab_rails['gitlab_email_reply_to'] = 'noreply@domain.com'

Mailjet 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "in-v3.mailjet.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "mailjet-api-key"
gitlab_rails['smtp_password'] = "mailjet-secret-key"
gitlab_rails['smtp_domain'] = "in-v3.mailjet.com"
gitlab_rails['smtp_authentication'] = "plain"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
gitlab_rails['gitlab_email_from'] = 'gitlab@domain.com'
gitlab_rails['gitlab_email_reply_to'] = 'noreply@domain.com'

Mailcow 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.example.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "yourmail@example.com"
gitlab_rails['smtp_password'] = "yourpassword"
gitlab_rails['smtp_domain'] = "smtp.example.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'none'

ALL-INKL.COM 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "<userserver>.kasserver.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "<username>"
gitlab_rails['smtp_password'] = "<password>"
gitlab_rails['smtp_domain'] = "<your.domain>"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_tls'] = true

webgo.de 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "sXX.goserver.host" # or serverXX.webgo24.de
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "webXXXpX"
gitlab_rails['smtp_password'] = "Your Password"
gitlab_rails['smtp_domain'] = "sXX.goserver.host" # or serverXX.webgo24.de
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['gitlab_email_from'] = 'Your Mail Address'
gitlab_rails['gitlab_email_reply_to'] = 'Your Mail Address'

mxhichina.com 

gitlab_rails['gitlab_email_from'] = "username@company.com"
gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.mxhichina.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "username@company.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "mxhichina.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true

Postmark 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.postmarkapp.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "your_api_token"
gitlab_rails['smtp_password'] = "your_api_token"
gitlab_rails['smtp_domain'] = "example.com"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
gitlab_rails['gitlab_email_from'] = 'gitlab@example.com'
gitlab_rails['gitlab_email_reply_to'] = 'noreply@example.com'

easyDNS (outbound mail)

Check if it’s available/enabled and configuration settings in the control panel. 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "mailout.easydns.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_force_ssl'] = true
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_user_name'] = "example.com"
gitlab_rails['smtp_domain'] = "example.com"
gitlab_rails['smtp_password'] = "password_you_set"
gitlab_rails['gitlab_email_from'] = 'no-reply@git.example.com'

Campaign Monitor 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.api.createsend.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "your_api_token" # Menu > Transactional > Send with SMTP > SMTP tokens > Token
gitlab_rails['smtp_password'] = "your_api_token"  # Same as gitlab_rails['smtp_user_name'] value
gitlab_rails['smtp_domain'] = "example.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'
gitlab_rails['gitlab_email_from'] = 'gitlab@example.com'
gitlab_rails['gitlab_email_reply_to'] = 'noreply@example.com'

Freehostia 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "mbox.freehostia.com"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "username@example.com"
gitlab_rails['smtp_password'] = "password_you_set"
gitlab_rails['smtp_domain'] = "mbox.freehostia.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'none'

Mailbox.org 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.mailbox.org"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "username@example.com"
gitlab_rails['smtp_password'] = "password_you_set"
gitlab_rails['smtp_domain'] = "smtp.mailbox.org"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'none'

Mittwald CM Service (mittwald.de) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "mail.agenturserver.de"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "username@example.com"
gitlab_rails['smtp_password'] = "password_you_set"
gitlab_rails['smtp_domain'] = "example.com"
gitlab_rails['smtp_authentication'] = "plain"
gitlab_rails['smtp_enable_starttls_auto'] = true

gitlab_rails['gitlab_email_from'] = "username@example.com"
gitlab_rails['gitlab_email_reply_to'] = "username@example.com"

Unitymedia (.de) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "submit.unitybox.de"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "username@unitybox.de"
gitlab_rails['smtp_password'] = "yourPassword"
gitlab_rails['smtp_domain'] = "submit.unitybox.de"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'none'
gitlab_rails['gitlab_email_from'] = 'gitlab@example.com'
gitlab_rails['gitlab_email_reply_to'] = 'noreply@example.com'

united-domains AG (united-domains.de) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.udag.de"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "example-com-0001"
gitlab_rails['smtp_password'] = "smtppassword"
gitlab_rails['smtp_domain'] = "example.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

gitlab_rails['gitlab_email_enabled'] = true
gitlab_rails['gitlab_email_from'] = 'gitlab@example.com'
gitlab_rails['gitlab_email_display_name'] = 'GitLab - my company'
gitlab_rails['gitlab_email_reply_to'] = 'noreply@example.com'

IONOS by 1&1 (ionos.de) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.ionos.de"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "your-user@your-domain.de"
gitlab_rails['smtp_password'] = "Y0uR_Pass_H3r3"
gitlab_rails['smtp_domain'] = "your-domain.de"
gitlab_rails['smtp_authentication'] = 'login'
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'none'
gitlab_rails['gitlab_email_from'] = 'your-user@your-domain.de'

AWS Workmail

From the AWS workmail documentation: 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.server"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "smtp user"
gitlab_rails['smtp_password'] = "smtp password"
gitlab_rails['smtp_domain'] = "example.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

Open Telekom Cloud 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "login-cloud.mms.t-systems-service.com"
gitlab_rails['smtp_port'] = 25
gitlab_rails['smtp_domain'] = "yourdomain"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_user_name'] = "username"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['gitlab_email_from'] = 'gitlab@yourdomain'

Uberspace 6

From the Uberspace Wiki: 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "<your-host>.uberspace.de"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "<your-user>@<your-domain>"
gitlab_rails['smtp_password'] = "<your-password>"
gitlab_rails['smtp_domain'] = "<your-domain>"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false

Tipimail 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = 'smtp.tipimail.com'
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = 'username'
gitlab_rails['smtp_password'] = 'password'
gitlab_rails['smtp_authentication'] = 'login'
gitlab_rails['smtp_enable_starttls_auto'] = true

Netcup 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = '<your-host>.netcup.net'
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "username"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "<your-gitlab-domain>"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
# Netcup is picky about the usage of GitLab's TLD instead of the subdomain (if you use one).
# If this is not set up correctly, the scheduled emails will fail. For example, if
# GitLab's domain name is 'gitlab.example.com', the following setting should be set to
# 'gitlab@example.com'.
gitlab_rails['gitlab_email_from'] = "gitlab@<your-top-level-domain>"

Mail-in-a-Box 

gitlab_rails['gitlab_email_enabled'] = true
gitlab_rails['gitlab_email_from'] = 'gitlab@example.com'

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = 'box.example.com'
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "username@example.com"
gitlab_rails['smtp_password'] = "password"
gitlab_rails['smtp_domain'] = "<your-gitlab-domain>"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true

NIFCLOUD ESS

SMTP Interface. 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.ess.nifcloud.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "SMTP user name"
gitlab_rails['smtp_password'] = "SMTP user password"
gitlab_rails['smtp_domain'] = "smtp.ess.nifcloud.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'peer'

gitlab_rails['gitlab_email_from'] = 'username@example.com'
gitlab_rails['gitlab_email_reply_to'] = 'username@example.com'

Check the SMTP user name and SMTP user password from the ESS dashboard. gitlab_email_from and gitlab_email_reply_to must be ESS authenticated sender email addresses.

Sina mail

User needs first to enabled SMTP through the mailbox settings via web mail interface and get the authenitication code. Check out more details in the help page of Sina mail. 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.sina.com"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "username@sina.com"
gitlab_rails['smtp_password'] = "authentication code"
gitlab_rails['smtp_domain'] = "smtp.sina.com"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['gitlab_email_from'] = 'username@sina.com'

Feishu mail

Check out more details in the help page of Feishu mail. 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.feishu.cn"
gitlab_rails['smtp_port'] = 465
gitlab_rails['smtp_user_name'] = "your-user@your-domain"
gitlab_rails['gitlab_email_from'] = "username@yourdomain.com"
gitlab_rails['smtp_domain'] = "yourdomain.com"
gitlab_rails['smtp_password'] = "authentication code"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = false
gitlab_rails['smtp_tls'] = true

Hostpoint

For more information about Hostpoint email visit their help page 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "asmtp.mail.hostpoint.ch"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "username@example.com"
gitlab_rails['smtp_password'] = "authentication code"
gitlab_rails['smtp_domain'] = "asmtp.mail.hostpoint.ch"
gitlab_rails['smtp_authentication'] = "plain"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['gitlab_email_from'] = 'username@example.com'

Fastweb (fastweb.it) 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.fastwebnet.it"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "your_fastweb_fastmail_username@fastwebnet.it"
gitlab_rails['smtp_password'] = "your_fastweb_fastmail_password"
gitlab_rails['smtp_domain'] = "smtp.fastwebnet.it"
gitlab_rails['smtp_authentication'] = "login"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false
gitlab_rails['smtp_openssl_verify_mode'] = 'none'

Scaleway Transactional Email

Read more about Scaleway’s Transactional Email. 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.tem.scw.cloud"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_user_name'] = "transactional_email_user_name"
gitlab_rails['smtp_password'] = "secret_key_of_api_key"
gitlab_rails['smtp_authentication'] = "plain"
gitlab_rails['smtp_enable_starttls_auto'] = true

Proton Mail

Proton documentation: How to set up SMTP to use business applications or devices with Proton Mail 

gitlab_rails['smtp_enable'] = true
gitlab_rails['smtp_address'] = "smtp.protonmail.ch"
gitlab_rails['smtp_port'] = 587
gitlab_rails['smtp_authentication'] = "plain"
gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_user_name'] = "<the Proton email address for which you generated the SMTP token>"
gitlab_rails['smtp_password'] = "<the generated SMTP token>"
gitlab_rails['smtp_domain'] = "<your domain>"
gitlab_rails['gitlab_email_from'] = "<the Proton email address for which you generated the SMTP token>"
gitlab_rails['gitlab_email_reply_to'] = "<the Proton email address for which you generated the SMTP token>"

More examples are welcome

If you have figured out an example configuration yourself please send a Merge Request to save other people time.

Testing the SMTP configuration

You can verify that GitLab can send emails properly using the Rails console. On the GitLab server, execute gitlab-rails console to enter the console. Then, you can enter the following command at the console prompt to cause GitLab to send a test email: 

Notify.test_email('destination_email@address.com', 'Message Subject', 'Message Body').deliver_now

Troubleshooting

Outgoing connections to port 25 is blocked on major cloud providers

If you are using a cloud provider to host your GitLab instance and you are using port 25 for your SMTP server, it is possible that your cloud provider is blocking outgoing connections to port 25. This prevents GitLab from sending any outgoing mail. You can follow the instructions below to work around this depending on your cloud provider:

Wrong version number when using SSL/TLS

Many users run into the following error after configuring SMTP: 

OpenSSL::SSL::SSLError (SSL_connect returned=1 errno=0 state=error: wrong version number)

This error is usually due to incorrect settings:

  • If your SMTP provider is using port 25 or 587, SMTP connections start unencrypted but can be upgraded via STARTTLS. Be sure the following settings are set: 

    gitlab_rails['smtp_enable_starttls_auto'] = true
gitlab_rails['smtp_tls'] = false # This is the default and can be omitted
gitlab_rails['smtp_ssl'] = false # This is the default and can be omitted

  • If your SMTP provider is using port 465, SMTP connections start encrypted over TLS. Ensure the following line is present: 

    gitlab_rails['smtp_tls'] = true

For more details, read about the confusion over SMTP ports, TLS, and STARTTLS.

Emails not sending when using external Sidekiq

If your instance has an external Sidekiq configured, the SMTP configuration must be present in /etc/gitlab/gitlab.rb on the external Sidekiq server. If the SMTP configuration is missing, you may notice that emails do not get sent through SMTP as many GitLab emails are sent via Sidekiq.

Emails not sending when using Sidekiq routing rules

If you are using Sidekiq routing rules, your configuration might be missing the mailers queue which is required for outgoing mail.

For more details, review the example configuration.

Email not sent

caution
Any command that changes data directly could be damaging if not run correctly, or under the right conditions. We highly recommend running them in a test environment with a backup of the instance ready to be restored, just in case.

If you have correctly configured an email server, but email is not sent:

  1. Run a Rails console.

  2. Check the ActionMailer delivery_method. It must match the type of server you’re using, either :smtp for an SMTP server or :sendmail for Sendmail: intended. If you configured SMTP, it should say :smtp. If you’re using Sendmail, it should say :sendmail: 

    irb(main):001:0> ActionMailer::Base.delivery_method
=> :smtp

  3. If you’re using SMTP, check the mail settings: 

    irb(main):002:0> ActionMailer::Base.smtp_settings
=> {:address=>"localhost", :port=>25, :domain=>"localhost.localdomain", :user_name=>nil, :password=>nil, :authentication=>nil, :enable_starttls_auto=>true}

    In the example above, the SMTP server is configured for the local machine. If this is intended, check your local mail logs (for example, /var/log/mail.log) for more details.

  4. Send a test message using the console: 

    irb(main):003:0> Notify.test_email('youremail@email.com', 'Hello World', 'This is a test message').deliver_now

    If you do not receive an email or see an error message, check your mail server settings.

Email not sent when using STARTTLS and SMTP TLS

You may encounter the following error if both STARTTLS and SMTP TLS are enabled: 

:enable_starttls and :tls are mutually exclusive. Set :tls if you're on an SMTPS connection. Set :enable_starttls if you're on an SMTP connection and using STARTTLS for secure TLS upgrade.

This error occurs when both gitlab_rails['smtp_enable_starttls_auto'] and gitlab_rails['smtp_tls'] are set to true. If using SMTPS, set gitlab_rails['smtp_enable_starttls_auto'] to false. If using SMTP with STARTTLS, set gitlab_rails['smtp_tls'] to false. Run sudo gitlab-ctl reconfigure for the change to take effect.

Disable all outgoing email

note
This will disable all outgoing email from your GitLab instance, including but not limited to notification emails, direct mentions, and password reset emails.

In order to disable all outgoing email, you can edit or add the following line to /etc/gitlab/gitlab.rb: 

gitlab_rails['gitlab_email_enabled'] = false

Run sudo gitlab-ctl reconfigure for the change to take effect.