https://support.ozhosting.com/support/solutions/articles/48000959352-turn-off-dr-web-update-emails-in-plesk
Turn off Dr.Web update emails in Plesk : OzHosting Support Portal
turn offsupport portalwebupdateemails
https://www.rackaid.com/blog/a-quick-way-to-update-plesks-spamassassin-rules-to-fix-2010-issue/
Plesk: Update Spamassassin to Fix 2010 Bug
A SpamAssassin bug incorrectly flags 2010 emails as spam by adding 3.2 points to their score. Fix it by running sa-update to download current rules,...
plesk updateto fixspamassassinbug