Exchange Hostname

[snowsmart]

My Exchange 2K server is on my private network and has a private domain name "exsvr.a.com" with a private IP address 192.168.10.1, and I am using the firewall to port forward the email traffic from a public IP (with our public email domain name "mail.aaaa.com") to the Exchange sever.

Recently, lots of our outgoing emails were bounced back , the reason is because our email hostname show a private name " exsvr.a.com" when it talks to other email server.
so it got treated as a spam source.

Please advice how could I solve this problem.

thank you so much

 

[GreatSatan]

You need a DNS reverse ptr record that mathces your banner name on exchange.

To find out the exact banner name, do a telnet into the mail server on port 25 and look at the display banner (open command prompt, type cmd. type 'telnet mail.myserver.com 25'. You will see your banner name at the top (typically your mail server)

To set the reverse pointer record, contact your ISP. If it is a residential ISP, you are going to have a lot of trouble getting them to change it.

 

[snowsmart]

thanks for you repsone,

but the problem is the the hostname on the banner is a private hostname ( exsvr.a.com)and we do not own a.com.

and what we own is aaa.com. and my DNS has a reservse DNS point this mail.aaa.com to my hostname. but the problem is that the email from my server shows from exsvr.a.com not mail.aaa.com


henry

 

[Zelandakh]

In the SMTP connector is an option to change the field you need or you can do it globally as a change to the recipient policy using the recipient update service.

Either way, your @domain.com address needs to match your public DNS MX record IP address for the address sending out.

 

[Marcs41]

Another simple option to avoid this is to use your ISP as SmartHost.

Marc
[sub]If 'something' 'somewhere' gives 'some' error, expect random guesses or no replies at all.
Free Tip: The F1 Key does NOT destroy your PC![/sub]

 

[GreatSatan]

Dude, Make your reverse pointer record the same as the banner, not the mx record... Your ISP, if they allow DNS naming changes, should let you put whatever you want. My server xxx.myinternaldomain.com and I have it set as my reverse ptr record. Spam programs and SMTP proxies double check that, and that's what's causing it to fail. I'd put serious cash on it.

 

[snowsmart]

I found the solution

here is what I did, changed the hosname in the banner to match the public email server name.

Thanks you so much !

 

[58sniper]

HOW TO: Set the Masquerade Domain Name in Exchange 2000 Server

http://support.microsoft.com/kb/314331

Pat Richard, MCSE MCSA:Messaging CNA
Microsoft Exchange MVP
Want to know how email works? Read for yourself -

http://www.ietf.org/rfc/rfc2821.txt