I was recently asked which general purpose listservs in philosophy is worth subscribing to. I subscribe to the following three, which strike me as reasonably useful so far:

http://www.louisiana.edu/Academic/LiberalArts/PHIL/philosop.html
http://www.lsoft.com/scripts/wl.exe?SL1=PHILOS-L&H=LISTSERV.LIV.AC.UK
http://www.disputatio.com/esap-news/