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Change EHLO hostname for Exchange 2003 Server

Hi All,

I am currently experiencing an issue where messages are getting trapped in spam filters because of our outbound mail set up. Right when our Exchange 2003 server connects to another mailserver it uses it's true FQDN for the EHLO. I want it to use another which is registered as an MX record and has an A record for our domain. How can I force the Exchange server to do this?

Thank you.
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sandvine
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sandvine
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1 Solution
 
Rant32Commented:
If you have only one SMTP virtual server:

ESM > Servers > Protocols > SMTP Virtual Server, properties > tab Delivery > Advanced > Fully-qualified domain name

If you have multiple SMTP Virtual Servers, then you should change the one that's used in the Outbound SMTP connector for internet e-mail.

Also check any DNS or blacklist issues with your domain name on http://www.dnsstuff.com and http://www.dnsreport.com

Hope this helps.
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sandvineAuthor Commented:
Thanks for the reply. I have tried that and it didn't seem to work. It still uses the real host name for in the EHLO. Does the SMTP service need to be restarted for this to take effect?
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Rant32Commented:
There are no indications that you should restart the virtual service or SMTP service for this to work but it won't hurt to try.

Interesting quotes from RFC 2821:

1) "The SMTP client MUST, if possible, ensure that the domain parameter to the EHLO command is a valid principal host name"

2) "An SMTP server MAY verify that the domain name parameter in the EHLO command actually corresponds to the IP address of the client. However, the server MUST NOT refuse to accept a message for this reason if the verification fails: the information about verification failure is for logging and tracing only."
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sandvineAuthor Commented:
Thank you for your responses. As its turns out the SMTP service has to be restarted for this change to take effect.
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