I’ve increased both timeouts to:

  • 100 min. [Avast]
  • 5 min. [this is max. for OE]
    and it didn’t help. But as you wrote I have DSL connection so it shouldn’t be a problem [I’m trying to send about 1MB attachment].

I don’t have any spamkiller or any other similar program.

I’ve tried to send this mail with The Bat! and there is the same problem :-\