Exchange Open Relay?

[JBenci]

HAY GUYS!
I need to find out if my Exchange front end is a open relay, because I keep getting blacklisted and have tried many other steps to stop it.

If it is an open relay, how do I stop that?

Thank you!

 

[Claymore]

Version of Exchange?

Exchange 2003 is not set to relay by default. To check, in Exchange System Manager, expand the server name, Protocols, SMTP, and get properties on Default SMTP Virtual Server, Access tab, Relay, and make sure "Only the list below" is selected.

 

[ghalied]

Also, you can do an online check here, been using this site for ages.

http://www.mxtoolbox.com/

 

[The_Unbeliever]

If your Exchange is not an open relay, then you should check your PC's as one or two might have a spambot and pump spam out that way - and blacklist you that way.

I know, been there, done that, got the notification from Spamhaus...

 

[Claymore]

If your Exchange is not an open relay, then you should check your PC's as one or two might have a spambot and pump spam out that way - and blacklist you that way.

I know, been there, done that, got the notification from Spamhaus...

*wince*

Hopefully one will be sitting behind a firewall though, allowing only port 25 to/from the Exchange server, plus a proxy server and its ports.

 

[gregmcc]

I hope none of your PC's are allowed to do port 25 connections out to the internet