blkburn
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Reverse DNS Lookup and EHLO greeting in MS Exchange 2003 problem
Hello,
Our Exchange 2003 server keeps getting blacklisted by means of
<mail.ourcompany.com #5.5.0 smtp;553 Bogus helo jdesk. <http://unblock.secureserver.net/?ip=66.XXX.XXX.XXX>>
I have contacted our ISP and setup reverse dns for our IP to mail.ourcompany.com. I have also gone under the SMTP virtuial server in exchange 2003 manager and set the FQDN to mail.ourcompany.com as described in:
https://www.experts-exchange.com/questions/21334262/Reverse-DNS-Lookup-and-EHLO-greeting-in-MS-Exchange-2003.html?query=Reverse+DNS++EHLO+Exchange+2003&clearTAFilter=true
But I do not beleive this have been configured correctly still. We keep getting blocked and I have ran SmtpDiag.exe from Microsoft and it still reports our mail server saying ehlo as ourcompany.com instead of mail.ourcompany.com. When I telnet to our server it welcomes me as mail.ourcompany.com.
Does anyone know if this discrepensy would be casusing us to keep being blocked?
I have changed our FQDN is in the "Default SMTP Virtual Server" to mail.ourcompany.com but it is still ehlo as ourcompany.com, does anyone know where I can change this?
Thanks,
John
Our Exchange 2003 server keeps getting blacklisted by means of
<mail.ourcompany.com #5.5.0 smtp;553 Bogus helo jdesk. <http://unblock.secureserver.net/?ip=66.XXX.XXX.XXX>>
I have contacted our ISP and setup reverse dns for our IP to mail.ourcompany.com. I have also gone under the SMTP virtuial server in exchange 2003 manager and set the FQDN to mail.ourcompany.com as described in:
https://www.experts-exchange.com/questions/21334262/Reverse-DNS-Lookup-and-EHLO-greeting-in-MS-Exchange-2003.html?query=Reverse+DNS++EHLO+Exchange+2003&clearTAFilter=true
But I do not beleive this have been configured correctly still. We keep getting blocked and I have ran SmtpDiag.exe from Microsoft and it still reports our mail server saying ehlo as ourcompany.com instead of mail.ourcompany.com. When I telnet to our server it welcomes me as mail.ourcompany.com.
Does anyone know if this discrepensy would be casusing us to keep being blocked?
I have changed our FQDN is in the "Default SMTP Virtual Server" to mail.ourcompany.com but it is still ehlo as ourcompany.com, does anyone know where I can change this?
Thanks,
John
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That would cause some sites to fail. An IP address is not valid for MX records, so anyone doing a check to see if the domain is valid would fail that test.
Simon.
Simon.
sounds like Rdns is not setup correctly.
goto http://www.dnsstuff.com/
choose reverse dns, type in your mail server's ip address. (not domain name)
it should return mail.domainname.com
goto http://www.dnsstuff.com/
choose reverse dns, type in your mail server's ip address. (not domain name)
it should return mail.domainname.com
ASKER
Bilbus,
Thank you for the comment. The reverse DNS from our IP is setup to mail.ourcompany.com but our Exchange server is staying ehlo as ourcompany.com. I went to the site and it checks out ok.
Thanks,
John
Thank you for the comment. The reverse DNS from our IP is setup to mail.ourcompany.com but our Exchange server is staying ehlo as ourcompany.com. I went to the site and it checks out ok.
Thanks,
John
ASKER
The report told me that my Mx reccord is not host name instead it's an IP. I will correct this and see if it fixes, but I don't think that solves it would have anything to do with the bogus ehlo would it? Everyhting else said it checked out ok.
Thanks