Saw a few of spam sign-ups yesterday. Dumped my database and, well, I’m at about 15MB with 87 users and 51 repos so I’m not too worried about it right now. Priorities ya know?
Mailgun reports 100% delivery success rate yesterday though I didn’t have any permanent failures. Just two complaints from users who’s emails were probably picked by someone trying to mess with them.
If you didn’t see the email arrive just let me know and I’ll purge the user so you may try again. I also have SSO with GitHub and users have reported it works well so you could try that too.