Three weeks in, and the same abuse I have reported to Mailgun and here
is still ongoing.
Enough is enough. There is a fraction of legit emails from mailgun that
will suffer. Hopefully the non-deliverability will hit their stats and
these paying customers will either find a cleaner home or pressure
Mailgun to clean their acts.
smtpd_client_restrictions =
check_client_access cidr:/etc/postfix/mailgun_cidr REJECT If you want
your legit sender to reach this server, clean up the spammers among you.
...
and mailgun_cidr:
104.130.122.0/23
104.130.96.0/28
141.193.32.0/23
143.55.224.0/21
143.55.232.0/22
143.55.236.0/22
146.20.112.0/26
146.20.113.0/24
146.20.191.0/24
159.112.240.0/20
159.135.132.128/25
159.135.140.80/29
159.135.224.0/20
161.38.192.0/20
161.38.204.0/22
166.78.68.0/22
185.189.236.0/22
185.211.120.0/22
185.250.236.0/22
192.237.158.0/23
198.244.48.0/20
198.244.60.0/22
198.61.254.0/23
204.220.160.0/21
204.220.168.0/21
204.220.176.0/20
209.61.151.0/24
23.253.182.0/23
69.72.32.0/20
87.253.232.0/21
Any other IP address than this that belongs into the rejection list?
--
Yuval Levy, Ontario-licensed lawyer
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