Hi Willi, thanks for your answer. > Look at > http://www.iptables.org/documentation/tutorials/blueflux/iptables-tutorial.html#NEWNOTSYN > (The paragraph with "..bad Microsoft TCP/IP implementations.." ) > This *could* be the problem as long as your machine makes outgoing > sessions to these ports The mail server doesn't make outgoing connections to these ports (I think, I should have noticed it, because I have a DROP policy).Additionally, as I understand in your cited part of the netfilter manual, only microsoft products have these problems. My mail server is a qmail on linux 2.4.20. Maybe there are any other ideas? I would be thankful... Regards Kurt Tragant __________________________________________________________________ Arcor-DSL Flatrate - jetzt kostenlos einsteigen und bis zu 76,18 Euro sparen! Arcor-DSL gibt es jetzt auch mit bis zu 1500 Mbit/s Downstream! http://www.angebot.arcor.net/cgi-bin/angebot.cgi?key=b13e92247022
