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---
type: concepts, howto
stage: Manage
group: Access
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
---
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# Email notification for unknown sign-ins
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> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/27211) in GitLab 13.0.
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When a user successfully signs in from a previously unknown IP address,
GitLab notifies the user by email. In this way, GitLab proactively alerts users of potentially
malicious or unauthorized sign-ins.
There are two methods used to identify a known sign-in:
- Last sign-in IP: The current sign-in IP address is checked against the last sign-in
IP address.
- Current active sessions: If the user has an existing active session from the
same IP address. See [Active Sessions ](active_sessions.md ).
## Example email
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