I’m building a new set of mailservers for wordtothewise.com – our existing mailserver was “I’ll repurpose this test box for a week” about four years ago, so it’s long past time.
I tested our new smarthost by sending a test mail to gmail. This is the very first email this IP address has sent in at least three or four years, possibly forever:
host gmail-smtp-in.l.google.com[18.104.22.168] said:
421-4.7.0 [22.214.171.124 15] Our system has detected an unusual rate of
421-4.7.0 unsolicited mail originating from your IP address. To protect our
421-4.7.0 users from spam, mail sent from your IP address has been temporarily
421-4.7.0 rate limited. Please visit
421-4.7.0 http://www.google.com/mail/help/bulk_mail.html to review our Bulk
421 4.7.0 Email Senders Guidelines. u2si19966404pbz.202 – gsmtp (in reply to end of DATA command)
Sigh. IP warmup is hard.
I spun up our new MX and within three minutes, before I’d sent any test mail myself, I was seeing relay tests from the therichsheick spammer. Still scanning for open relays, still using the same Yahoo addresses. Followed immediately by someone else doing the same thing using gmail addresses.