Always Blacklist (SMTP HELO value forged)

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Posts: 3
Joined: Wed Feb 10, 2021 5:37 pm

Always Blacklist (SMTP HELO value forged)

Postby juanjose » Thu Sep 16, 2021 7:40 pm

Hello friends, my zimbra mail server has been blacklisted on
The error message is:

(IP, UTC timestamp, forged HELO value)
xxxxxxxxxxx 2021-09-16 13:20:00
xxxxxxxxxxx 2021-09-15 17:50:00
xxxxxxxxxxx 2021-09-15 15:30:00
xxxxxxxxxxx 2021-09-15 13:35:00
xxxxxxxxxxx 2021-09-15 12:10:00

The first detection was (UTC) 2020-12-10 16:40:00
The last detection was (UTC) 2021-09-16 13:20:00

Could you help me to solve it urgently please! I tried everything and I can't find the problem, I am a newbie in this spam things. thanks.

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