It very much depends on the hosting service you are using or making use of git hooks. Sourcetree does not support that functionality itself.
For git hooks suggestions see: https://stackoverflow.com/questions/552360/git-hook-to-send-email-notification-on-repo-changes
If you are using a Git hosting service you can use notifications.
For Bitbucket https://confluence.atlassian.com/bitbucket/manage-email-notifications-325321743.html
For GitHub https://help.github.com/articles/about-notifications/
Supported Platforms macOS Windows We recently introduced support for additional hosting services such as GitHub Enterprise, GitLab (Cloud, Community Edition, Enterprise Edition), and...
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