Hello Tech,
I use Outlook Express, Windows Xp, Windows Defender and Zone Alarm (current freebie). I can send an email without attachments. The emails not going are with one or more jpg attachment and they can be sent only if I stop on access protection. They then get sent as normal with the bar working its way slowly across the send/receive window whereas when Avast is running the bar goes almost all the way across the window and stops until I get the time out msg. I get a time out msg "SMTP server has not responded in 60 seconds...."
Tom