Ubuntu unattended upgrade trashed my Kolab!

[Tom Friend]

I have been using Kolab 16 on a Ubuntu 18.04 LTS server box with few
problems. When I have had problems, I send in patch suggestions.

Well, two days ago, ubuntu pushed down an "unattended upgrade" that
included many updates to clamav. Since then, my mail has not been
functional at all.
It looks like the "master" process is listening on post 25 and 1025-
shouldn't that be postfix? I'm open to any help and/or suggestions.
TIA,
Tom
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