> Paul Cocker schrieb: > >> >>>>> Definitely nothing in between, of that I'm certain. >>>> >>>> Are there any tools which will give me more information >>>> >>> about attempts >>> >>>> to connect to a port on a remote host? >>>> >>> use tcpdump for that purpose >>> >>> please try >>> >>> $ telnet $IP_OF_SMTP_HOST 25 >>> >>> and show exactly, what you get >>> >>> >> I ran windump in the background and did a telnet to the IP, however a >> findstr on the output file contains no matches. If I do the same thing >> using the server name the only matching output in the dump is when the >> server performs a name lookup, after that there are no matching entries >> by IP or name. >> >> Am I doing something wrong? >> > There are a few things that can make postfix listen only locally.
One is firewall. You say it isn't an issue. On the postfix machine, if it is a Unix machine, use lsof -Pni to verify what ports and addresses master is listening on. If it is only listening to 127.0.0.1 then you have a problem with inet_interfaces, or else the look up of the host name listed in inet_interfaces. On many Linux machines, the host resolution order is hosts, dns, and so a bad entry on /etc/hosts can sting you. Make sure you don't have 127.0.0.1 set up with the internet host name of the server in /etc/hosts. It should be only localhost next to 127.0.0.1 I've seen Redhat installs with this messed up. --Donald
