The procmail command /bin/procmail is owned by group mail, when it should be owned by root

Komplikacja

Utworzenie wirtualnego serwera w Virtualmin kończy się
The procmail command /bin/procmail is owned by group mail, when it should be owned by root. Email may not be properly delivered or checked for spam.

Rozwiązanie

Wybierz Email Settings → Spam and Virus Scanning | Spam and Virus Scanning: spamc (Client for SpamAssassin filter server spamd)
Powyższe rozwiązanie, eliminuje komplikację
Warning!  SpamAssassin does not appear to be set up in the system's Procmail configuration file /etc/procmailrc, so any configuration done using this module will have no effect unless users have it set up individually.