Hi Lonny:
Welcome to the forum.
Please help us help you.
What version of Avast! are you using
What vps version?
What OS?
etc. etc.
Are you running a mail scanner such as MailWasher or any other program that scans your e-mail?
Also, unless all of NAV has been removed, you will have problems. Avast and Norton aren’t compatible.
Check the link in my signature for a link to help you totaly remove NAV.
If you need more help, post back here.