In GitLab 7.8.x, smtp settings example file contained the line openssl_verify_mode: 'none'. This meant that mail server TLS certificate wasn't verified by GitLab.
Confusion came from assumption that none is the default value when TLS is enabled and that it behaved the same as when the setting is omitted. In contact with Rails team member we've learned omitting openssl_verify_mode defaults to peer.
If you have installation from source, smtp enabled, TLS enabled and the above setting we advise you to change the setting to openssl_verify_mode: 'peer'.
Installations using omnibus packages are not affected.
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