Over the last few days, I have been having a problem with receiving my mail via fetchmail, but other methods were working fine. Since I was able to receive other sorts of internet data, web pages, IM, and the like.
Just a few minutes ago, I figured out the problem. All programs attempting to connect to the ‘lo’ interface (all my local servers) were unable to work because both my eth0 and lo interfaces were non-functional… Something knocked out my /etc/network/interfaces files, which is the Debian method for configuring all the network interfaces (except ppp). I recreated the file, and issued an ‘ifup eth0′ and ‘ifup lo’, and things seem to be working again.