lukor
3
Paul,
avast! should not be automaticly scanning connection to localhost. So whenever your mail client (or some ‘utility which scans and edits incoming mail on the local server’) connects to 127.0.0.1 it should not be intercepted by avast!.
Please check the avast4.ini file, in Alwil Software\Avast4\DATA folder.
Find the section [MailScanner], the option ‘IgnoreLocalhost’ should control this behavior. It should not be there at all, or it might be there in the form ‘IgnoreLocalhost=1’.
This way, only connections leaving your PC would be scanned - that is when your local SMTP server pulls the mails from remote host.
Please recheck this and let us know if it helped.
Of course, you can also switch the feature completly off - as Vlk suggests.
Lukas.