Go Premium for a chance to win a PS4. Enter to Win

x
  • Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 481
  • Last Modified:

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:

http://www.experts-exchange.com/Networking/Email_Groupware/Exchange_Server/Q_21334262.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
0
blkburn
Asked:
blkburn
  • 2
  • 2
1 Solution
 
SembeeCommented:
Go to dnsreport.com and see what that says. That shows how the Internet sees your server.

Simon.
0
 
blkburnAuthor Commented:
Simon,
   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
0
 
SembeeCommented:
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.
0
 
bilbusCommented:
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
0
 
blkburnAuthor Commented:
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
0

Featured Post

Simplify Active Directory Administration

Administration of Active Directory does not have to be hard.  Too often what should be a simple task is made more difficult than it needs to be.The solution?  Hyena from SystemTools Software.  With ease-of-use as well as powerful importing and bulk updating capabilities.

  • 2
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now