I have been gettig ~1000’s of spam emails by a user who is apparently commenting on Visual UML diagram editor (#15932) · Issues · GitLab.org / GitLab · GitLab since today afternoon.
Initially the user showed up as “fixgitlab spam gitlab@mg.gitlab.com” , which has since changed to " Ghost User gitlab@mg.gitlab.com". I believe this was a result of him/her being banned.
User @ave seems to have already reported this user as per the last comment on the issue.
The spam continues even after the user has been blocked, and I suspect in this particular case , the initial username seems to suggest that the user is trying to make a point : Blocked users can still somehow spam issues.
Ps: Gitlab issues under spam attack? - #2 by dnsmichi , @JAZ013 seems to have the same issue, reported in the other thread.