Does anybody know why outlook on xp doesn't send large out going mail & the time out appears
it has only done this when i installed avast
avast scans the outgoing email, this can appear that there is no activity from the server and outlook pops-up the time-out, do you want to wait, etc.
You could also extend the delay before you get this pop-up from outlook. This may be better than disabling smtp, if it is just the pop-up that is bugging you.