I'm working on a system that I did not set up. The person who did set it up is not available.

The mail system is running slower than normal. I get the following error when starting it --

Starting sendmail: WARNING: Xspammilter_to: local socket name /var/run/f1.sock missing

If I go to /var/run, there is indeed no f1.sock socket file there. Could this be slowing down the system, and if so how do I recreate the socket file?