Yes, that would appear to have the effect of mailwasher doing its checking on the local host 127.0.0.1 (HDD) rather than at the mail server.

This would happen if you installed pro after avast (or imported an email account into MW Pro after avast) as it copies the account information from your email program and that has had its server, username settings changed by avast.

EDIT: The whole point of MailWasher is that it doesn’t download full emails to check them, only headers and xx number of lines to help classify as spam, etc. This is done as plain text (not in your email program) and no script activation.

So, I believe the overhead of checking with avast is not required.