I learned that we have been blacklisted after one of my users tried to send e-mail to a client and it bounced. We are 188.8.131.52. I double-checked our server and it can't be used to relay. How could mail from us hit a "spam trap"? Would a user have to do this or could this have been caused by the MyDoom virus (we got hit on one machine before the new definition was released)? HELP! I don't even know where to look to determine the cause for this! Thanks, in advance.