I just traded email with a friend of mine.  My initial response to him included a swear word (I know, I know, apparently I am a little evil - but only prime-time-tv evil).  Apparently our spam filter on our gateway rejects incoming mail due to language, but not outgoing email.  That must actually cut down on a lot of email that's intended for me.  :)

>Wow, chris can curse in his emails, but we can't curse in the emails to HIM.

PERM_FAILURE: SMTP Error (state 12): 550 5.7.1 <Your e-mail was rejected by an anti-spam content filter on gateway (205.248.102.79).Reasons for rejection may be: obscene language, graphics, or spam-like characteristics. Removing these may let the e-mail through the filter.>