That may well be the case, but in one post you have provided more information than all mantra's initial posts.
So replies have virtually been a process of elimination/guess work because of a lack of information. I still don't know when/why mantra gets the warnings and for what provider.
Personally I don't use silent mode, because I want to know what is going on with my system. If someone is getting so many warnings of virus infection, infected emails, etc. then it is time to review their security practice - filter emails at source, delete from server rather than download them, etc.