Exchange 5.5 relay

[z1pp0]

Hi,

I have just had to shut down my 5.5 server because it was running really slow and causing problems for clients. It seems its being used as a relay by somebody. Is there a way within Exchange to restrict this. I dont know this application very well.

Many Thanks

 

[jonarden]

You may find

http://www.exchangeadmin.com/Articles/Index.cfm?ArticleID=7696&pg=1&show=666

provides what you're looking for; especially the section "A Better Option".

 

[JoshT976]

Check out this post:

thread10-588932 had the exact same problem. People were using my Exchange Server as a relay to send their "crap" (nice way of putting it) through my service.

I changed my SMTP address settings to point at earthlinks (MY ISP) SMTP Server (which has a static IP address), and that took care of the problem)

Point yours at your ISPs. They should have a public SMTP address that they can give you information on.

Hope that helps

JT

 

[murrik]

Hello z1pp0,

To restrict relaying (for your local network of 192.168.1.xxx for example), just do the following:

- Start Exchange Administrator
- Goto your site / Connectors / Internet Mail Service
- Goto "connections" tab and hit "Specify by host" button
- In the next window you should list all the IPs allowed to deliver mail via your server. To do so, hit "Add" button and provide IP addresses in a form of 192.168.1.0/255.255.255.0/Allow connections from this host.

Hit Okays as necessary and restart your IMC service.

That should work in any configuration - directly connected to Internet, ADSL / cable and so on...

Murrik

 

[JoshT976]

murrik,

You stated:
"In the next window you should list all the IPs allowed to deliver mail via your server."

so would I just enter the Server IP then????

 

[Robnhood]

Don't forget. Once you have fixed your exchange server from relaying you can test it via a couple of other sites such as:

http://www.spamhaus.org

http://www.ordbs.org

Once you are confident that you mail server is not relaying mail, you might want to verify that you are not on a relay block list.

Craig.

Craig

http://www.SecurelySpeaking.com