Detections aren't 100% guaranteed on any AV.
Ok, this may be a problem.
But what can I do against the timeouts that I reported for outgoing virus checks?
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Which is why I suggested:
Not sure what those proxy settings are that are causing the problem, but if you want to create another topic on the problem we will try to help.
Sorry - it was not me who wrote about proxy troubles.
My problem is: when sending EMails with Thunderbird, I often got timeouts from my GMX provider (timeout from SMTP-Server). When trying to send it once more, it mostly worked. But it's annoying to send most mails two or three times.
After switching the Avast-scan for outgoing mails OFF it works now. With the problem you mentioned that malware can be sent without my knowledge.
Do you have a solution for this situation?