Here is the scenario. Maybe you've just gotten a bounce message that looks like this: Aug 25 11:20:24 s1 postfix/smtp[26906]: 98299221BB: to=<x@gmail.com>, relay=gmail-smtp-in.l.google.com[142.250.141.27]:25, delay=1.2, delays=0.04/0.77/0.2/0.21, dsn=5.7.1, status=bounced (host gmail-smtp-in.l.google.com[142.250.141.27] said: 550-5.7.1 [206.125.175.2] Our system has detected that t…
