Stop spammers from using my Exchanger Server

[tmc3306]

I am using Exchange 5.0 sp 2 and NT 4.0 sp5.  From the messages in the Event Viewer it appears that someone has been using my Server to send spam.  How do I stop this from happening.  Someone mentioned stop message relay?

 

[Guest_imported]

That's correct. You have to stop "relay" in the Internet mail connector to do this.

 

[tmc3306]

I have been unable to find that feature to turn it off

 

[PghMikeH]

From the ORBS website, <A HREF="

http://www.orbs.org/otherresources.html"

TARGET="_new">

http://www.orbs.org/otherresources.html</A>,

you'll find this text:<br><br>MS Exchange 5.0 can only be secured against unauthorised relaying by disabling all internal POP3/SMTP<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;access. That is, all internal clients must be running Microsoft message exchange software and email clients<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;such as Pegasus, Eudora, Netscape, etc cannot be used after the server has been secured in this way. This<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;should be regarded as a temporary fix, because eventually someone will probably re-enable<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;POP3/SMTP. Please update to MS Exchange 5.5sp2 or later as soon as possible. <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Owners of MS NT Small Business Server (SBS) 4.0 are able to upgrade to 4.5 for free or a nominal fee.<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;This includes an update to MS Exchange 5.5. <br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;To quickly verify a machine: Any MS Exchange mailserver which shows a version number below 5.5.2448<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;on its SMTP port is unlikely to be fully secure. 5.5.2448 is only secure by explicit configuration as MS<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Exchange defaults to no relaying control <p> Mike Hillwig<br><a href=mailto:mike@hypermike.com>mike@hypermike.com</a><br><a href=

http://www.hypermike.com>Hypermike.com</a><br>I've

done more R5 deployments than I care to think about.

 

[GatewayHC]

Guys, there's a FAQ on this.

Basically, enable SMTP routing, click Restrictions, Check Hosts with these IP addresses, then put no addresses in the list. Restart IMS & you're good.