Miraculously, mail servers that do not use/check neither SPF, DMARC nor DKIM still exist. This one from a consulting company in Hungary allowed me to track down the sender of spam using one of my mail accounts as spoofed `from:`. So, dear 1.202.53.77 from China, welcome to my blocklist :)

#SelfHost #MailAdmin

@jwildeboer On the other hand, there are still domains not even implementing SPF out there.

And I'm talking about government domains.... 🙄