Gitlab_rails = true # The email address including the % should be included in its entirety within the email # address and not replaced by another value. , and ensuring that you do not employ any services thatĪuthenticate solely based on access to an email domain such as *.Īlternatively, use a dedicated domain for GitLab email communications such asįor a real-world example of this exploit. We recommend receiving incoming email on a subdomain, such as Merge request on the project owned by the attacker, allowing them to select theĬonfirmation link and validate their account on your company’s private Slack This would send a confirmation email, which would create a new issue or Incoming email domain to, an attacker could abuse the “Create newįeatures by using a project’s unique address as the email when signing up for If you also host a public-facing GitLab instance at and set your Security concernsīe careful when choosing the domain used for receiving incoming email.įor example, suppose your top-level company domain is .Īll employees in your company have an email address at that domain via GoogleĪpps, and your company’s private Slack instance requires a valid address to sign up. To set up a basic Postfix mail server with IMAP access on Ubuntu, follow the Instead of the regular password for the mailbox. If you want to use Office 365, and two-factor authentication is enabled, make sure If you want to use Gmail / Google Apps for incoming email, make sure you haveĪnd allowed less secure apps to access the account X-Autoreply with a value of yes Set it up.Auto-Submitted with a value other than no.To prevent unwanted issue creation from automatic email systems, GitLab ignores all incoming email These are checked in the order that they appear. The Received header can contain multiple email addresses. The address was included when using “Reply all”.However, it might not include the configured GitLab email address if: Usually, the “To” field contains the email address of the primary receiver. It is not used for creating issues by email. The References header is also accepted, however it is used specifically to relate email responses to existing discussion threads. Accepted headersĪccepting Received headers introduced in GitLab 14.9.Įmail is processed correctly when a configured email address is present in one of the following headers This method only supports replies, and not the other features of incoming email. To set up this solution, you must create a dedicated emailĪddress to receive your users’ replies to GitLab notifications. Receives all email messages addressed to the domain that do not match any addresses thatĪs of GitLab 11.7, catch-all mailboxes support the same features asĮmail sub-addressing, but email sub-addressing remains our recommendation so that youĬan reserve your catch-all mailbox for other purposes. Leaving a catch-all available for other purposes beyond GitLab. If your provider or server supports email sub-addressing, we recommend using it.Ī dedicated email address only supports Reply by Email functionality.Ī catch-all mailbox supports the same features as sub-addressing as of GitLab 11.7,īut sub-addressing is still preferred because only one email address is used, Microsoft Exchange Server does not support sub-addressing,Īnd Microsoft Office 365 does not support sub-addressing by default. Postfix mail server, which you can run on-premises. Gmail, Google Apps, Yahoo! Mail,, and iCloud, as well as the Email sub-addressingĪ mail server feature where any email to ends up Let’s walk through each of these options. Dedicated email address (supports Reply by Email only). ![]() GitLab requires one of the following three strategies: Handling incoming email messages requires an IMAP-enabledĮmail account. Any incoming email messages not intended for GitLab receive a reject notice. ![]() We recommend using an email address that receives only messages that are intended for Reply by Email: allow GitLab users to comment on issuesĪnd merge requests by replying to notification email.Īllow GitLab users to create a new issue by sending an email to aĪllow GitLab users to create a new merge request by sending an email to a.GitLab has several features based on receiving incoming email messages: Use encrypted credentials Incoming email.
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