In a boneheaded movei I accidentally committed my SendGrid creds to GitHub. Pretty quickly after, GitHub alerted me. However by then my SG account was sending thousands of automated spam messages. Those automated scammer systems are FAST.

Not particularly germane to the discussion, but really disappointed in how SendGrid handled things. I notified them immediately, rotated all API tokens, and tey could not turn it off, so the spammer sent messages for days and eventually my SG account got suspended.