Today at work I tried to use splitmail (a Linux sendmail tool) to send an email from a linux box plugged into the network. I configured sendmail the same (I ran the same configuration file to make /etc/sendmail.cf) as I have it configured at home (where it works fine). I have a dialup connection at home to my ISP. At work we have a huge network (a wan?)
There are two places in the configuration file which refer to my ISP. I didn't know if it would work when the computer was not connected to my ISP, but I tried it, anyway.
These are the two lines that refer to my ISP: