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I think you have something else going on here. Why are all your spam scores so low (maybe your bayes is poisoned)? Is this spam originating from the server itself? Your spam scores should be much higher. With a spam level of 1 how is any legitimate email supposed to go though? I recommend that...

@Hangover2 Why don't you just enable the spam kill level and reject the email before it gets redirected? https://www.danami.com/clients/knowledgebase/251/How-can-I-enable-the-policy-spam-kill-level-in-order-to-reject-mail-over-a-certain-score.html

@Hangover2 Unfortunately we aren't going to add that back. It's better to guide the inexperienced user. A bunch of those values you provided are basically invalid proving my point.

@Hangover2 What spam level do you need to set that isn't included in the provided select lists? This was removed because there were too many people setting improper values.

@Alex Presland I've already opened a ticket with Plesk support and they have access to the server and are looking into it. I will update this thread when I know more.

Warden Anti-spam and Virus Protection 4.01 has been released: https://www.danami.com/clients/announcements/143/Warden-Anti-spam-and-Virus-Protection-4.01-Released.html This release adds Debian 12 support, new command line interface, and more!

@Peter Debik I checked and all the domains have their domain keys in /etc/domainkeys/<your domain>/default and the server is using Postfix+Dovecot already so I guess I'll open a ticket with Plesk on Monday.

@dash Yes that's what I thought as it will connect using the socket when you use localhost. Unfortunately I couldn't see a quick easy fix without overriding the mariadb unit file like this...

Username: TITLE Arc errors in maillog PRODUCT, VERSION, OPERATING SYSTEM, ARCHITECTURE Product version: Plesk Obsidian 18.0.58.0 OS version: AlmaLinux 8.9 x86_64 Build date: 2024/01/05 08:00 Revision: ec671a07e896ad1b354270e5a4c8597163abfc66 PROBLEM DESCRIPTION...

@Peter Debik Not sure if this is related but there is a bug on newer versions of MariaDB/MySQL where it refuses connections to the socket with SELinux enabled. I've been tracking it and it doesn't look like the fix has made it's way to OS builds yet. https://jira.mariadb.org/browse/MDEV-24941...

@Peter Debik I've converted two servers so far and there were only a few issues to sort with rsyslog after the conversion. So far I'm pretty impressed and it saved us a tonne of time :)

It's not recommended to just stop the ClamAV daemon because Amavis will just fall back to using the ClamAV binary instead which will actually cause more server load (clamav signatures need to be loaded into memory with every email scanned with the binary). Admins can disable the fallback backup...

Just a follow up to this. If you want to disable Amavis temporarily without having to uninstall Warden you can uncheck the SMTP milter and Non-SMTPD_Milter check boxes under Warden -> Settings -> Milter Settings. This will disable any scanning from Amavis and ClamAV. Here is our KB article for...

@kkevin93 Yes this is possible. You just have to set the spam kill level for the policy. This KB article should help you: https://www.danami.com/clients/knowledgebase/251/How-can-I-enable-the-policy-spam-kill-level-in-order-to-reject-mail-over-a-certain-score.html

Here is some info on the content-type header as to why these might be getting wrapped: https://www.w3.org/Protocols/rfc1341/rfc1341.html It states: (4) Lines longer than 76 characters may be wrapped or truncated in some environments. Line wrapping and line truncation are STRONGLY DISCOURAGED...

@Kaspar No he said that DMARC still failed with the amavisd-milter removed from the Postfix config.

@Alex Presland You can uncheck the "SMTP milter" and "Non-SMTP milter" checkboxes under Settings -> Content Filter Settings -> Milter Settings to remove the amavisd-milter from Postfix for testing and see if DMARC will pass with it disabled.

@FutureX Sorry I'm not sure about Digital Ocean's DNS servers. You should be able to test it out with: dig 2.0.0.127.zen.spamhaus.org +short https://check.spamhaus.org/faqs/?id=simple_command_line_test_of_your_dns_resolver

Honestly when Warden is properly setup you really shouldn't need to add any custom rules. You already have a tonne of network tests like Razor2, Pyzor, DCC with daily rule updates from the KAM ruleset so spam already scores well above the default spam level.

No it shouldn't conflict. Also we have two week free trials so you can test things out before hand and see if it works for you.