Ever get hit with an address where you don't recognize the extension at all? This is a handy little link:
http://www.webopedia.com/quick_ref/topleveldomains/countrycodeA-E.asp
The reason I have it is kinda odd. Recently an individual from Portugal (.pt) joined our GCNUG mailing list. Ok, no big deal. Then he quit. Then he joined again. We moderate all first-time posts so I wasn't worried about spam, but it did attract my attention. So I'm looking at his email address and I'm wondering... where the heck is .pt? So I did a quick google and came up with the link above. Like I said... handy. :)
C.