If he sends by SMTP he can specify any return address he wants. Do you allow relay by SMTP? Even if you have relay disabled, a user can send "from" that address just by adding it to the headers of the message. You should read and understand Internet RFCs 821 and 822, and their successors 2821 and 2822 and then you'll better understand how spammers ply their trade.
Ed Crowley MCSE+Internet MVP Freelance E-Mail Philosopher Protecting the world from PSTs and Bricked Backups!T -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Smith Thomas Contr 911 SPTG/SC Sent: Friday, October 31, 2003 7:47 AM To: Exchange Discussions Subject: Bogus Email I have Exchange sever 5.5., and our naming convention is first name. last name. There is some one who is emaiing porno to users and is going by [EMAIL PROTECTED] How can he do this with out using our naming convention ie.. [EMAIL PROTECTED] any help would be appreciated. _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang =english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang=english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
