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If you trust that IP, you can add it to the whitelist and it will not be blocked. Or you can create your own bash script to run every 15 minutes to unblock IPs on your own white list. I don't recommend to unblock any IP every 15 minutes or hackers will not be blocked and your email will be attacked ...

Sarah, I have this scenario, one customer has a scanner that sends an email from one defined account but the file format that the scanner uses is RAR. On my server I block RAR files to any one, but on this particular case FAX can't send in another format and I need to allow this email address to del...

Great!
Good to know that ESET can cause this issue, wrote this on my own notes for a future reference, thanks.

Sergio

In cPanel, you can do the following:
- In mail control add the domain to the white list, so, it will not be checked for spam; or
- Create an antispam rule to decrease the rule points for this specific email address and subject.

Sergio

Do you receive any message from the server about this issue?
Or, Have you checked on all the logs some info about this?

Any log line will help.

Sergio

You don't need to do this at any device level, you can do it a cPanel level.

Just enter into cPanel go to "Email Filters" and create the rule to delete those emails.

Sergio

@mpiber,
You wrote "when activating CSF on my server I can't make internal communication between them".

Check on CSF logs what is blocking the IP and post it here.

Sergio

As the email is pure informative it means that you don't do have to do anything more than check why dovecot is reporting this. So, you don't need to add any rule into pignore as it is been ignored by the OS. Checking on the anvil process: is responsible for tracking authentication penalties for diff...

If you provide a complete log line where that info appears, a regex can be done.

Sergio

Or you can add that IP into cPHulk Black List.

Sergio