a) What is container directory? - sorry just never heard about it.
b) It means the file clean - at least according to the last VPS-engine. Why you need report for clean file?
c) It should be yes, if you allowed it, but avast don’t scan SSL/TLS (secured) connection. If any virus from email tried to access memory, avast shall stop it.
a) Sorry for translation failure: in english-version the german “container” is named “All chest files” - “Infected files”. Question: Where to find this files on the harddisc in win-xp?
b) A report, at least some feedback, is needed, because scanning a single file is so fast, that there is no reaction on screen visibly for human eyes :-)…yes, really. Imho, it’s normal that after a action is finished, specially a virus-scan, a result is shown. Misuse is reduced …