OK, When we first setup our Exchange, we installed an SMTP server in our DMZ to handle inbound mail. We weren'r fast enough on protecting from relaying though and for about 4 hours on that day (early February), that SMTP server was open for relaying. Damned if someone in malaysia didn't find it and start relaying through us!. We stopped it (the server) reconfigured it, started it back up and all was well, no one can use it as a relay, we get mail through it, send mail through it, all good right? No. It does work as designed, however we still get 4-500 mails an hour from some putz trying to use it. He can't, but for each message, he gets a non delivery. This still floods our system with un-needed traffic. Here's what I see, The person establishes an SMTP copnnection on port 25 They send the message Our server digests it, sees we cannot accept messages for relay send off a notification to the sendor stating that fact. The sender then sends the next message, and on and on for ever and ever. My question. How can I make this stop! Just because some A-Whole had an open port for a couple of hours months ago, now I get his spam mail 24 hours a day. Doug Stelley Network Admin. Olean General Hospital (716)375-7320 Logic is a tweeting bird in a green meadow. - Mr. Spock _________________ Confidentiality Notice: The information contained in this message may be legally privileged and confidential information intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, or the employee or agent responsible to deliver it to the intended recipient, you are hereby notified that any release, dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error please notify the author immediately by replying to this message and deleting the original message. Thank you.