7.0.1426 web shield blocking Outlook send

I updated to 7.0.1426 a week ago and I can’t get Outlook to send mail. I’ve narrowed the issue to the web shield. If I turn the web shield on, it won’t send. If I turn the web shield off, it will send. I running MS Outlook 2007 SP3 and sending via POP. I tried adding an exclusion in the web shield for both secureserver URLs, but it did no good. I uninstalled the Avast Outlook spam add-in, but that didn’t help. Any ideas?