Zimbra / Amavis blocking attachments

[cureit]

Dear MagicSpam-Team,

it is no longer possible to send out mails with a pdf attachment, due to the following error message:

Sep 1 16:27:42 mail amavis[23313]: (23313-01) do_notify_and_quarantine: spam level exceeds quarantine cutoff level 11
Sep 1 16:27:42 mail amavis[23313]: (23313-01) Blocked SPAM {DiscardedOutbound}, ORIGINATING_POST/MYNETS LOCAL [127.0.0.1]

We are currently running Zimbra [Release 8.8.15_GA_4362.RHEL8_64_20220721104405 RHEL8_64 FOSS edition, Patch 8.8.15_P41] with MagicSpam [2.1-14.3].

Disabling MagicSpam does not resolve the issue, only after uninstalling MagicSpam, e-mails get sent out correctly again.

Please urgently advise us on this issue.