Windows XP Home, firefox browser and thunderbird e-mail. I'm not computer literate.
I just downloaded avast! 4 home.
Now, when I try to send e-mail it won't go out. If I exit the avast, the e-mail goes through.
I tried to send with avast working and shutting of the windows firewall and it still wouldn't go through.
Went back again and shut down avast and again was able to send e-mail.
Nothing else has been changed.
Prior to this I used Trend Micro which has expired, but never had a problem with that.
When the mail fails to go through, a box pops up with a message:
"mail server responded 5:70 must issue a STARTTLS command first"
"verify e-mail address is correct in your mail preferences and try again"
I also tried "pausing" the avast e-mail "provider" but mail wouldn't go through doing that either.
Thanks for any help you can provide.