possibly an exchange routing issue or a relay issue or a router issue.

possibly an exchange routing issue or a relay issue or a router issue.

Post by v-robme » Fri, 05 Sep 2008 21:03:04



Hi,

Thanks for your response.

Please also use Nslookup.exe to test and make sure you can resolve the
btinternet.com from your SBS server. If it can be resovled, please use
telnet btinternet.com 25 port to see if SMTP port is open.

Please take your time to have a look the suggested articles.

Thanks for your earlier feedback!

Best regards,
Robbin Meng(MSFT)
Microsoft CSS Online Newsgroup Support
Get Secure! - www.microsoft.com/security
 
 
 

possibly an exchange routing issue or a relay issue or a router issue.

Post by v-robme » Wed, 24 Sep 2008 13:49:48


Hi,

Glad to hear from you and know you found the root cause, the issue is
resolved.

Considering the issue had been resolved, for the purpose to help other
people to get help from our experience, I would like to make a summary
here. If you have any further concern regard to this issue, feel free to
let me know.


Problem Description:
===================
One domain user account cannot send emails to the btinternet.com. email
just disappears into the thin air and XXXX@XXXXX.COM never receives
it.


Cause:
===================
A Reverse DNS record issue


Resolution:
===================
Modified A pointer (PTR) record which does not exist or is not valid for
the source SMTP server's IP address.

Here are some SBS 2003 server articles for your reference:

You are unable to send or receive SMTP messages from certain Internet
domains in Exchange 2000 Server, in Exchange Server 2003, and in Small
Business Server 2003
http://www.yqcomputer.com/

The "Perform Reverse DNS Lookup for Incoming Messages" Option Is for Host
Name Resolution
http://www.yqcomputer.com/

Protecting Against Address Spoofing
http://www.yqcomputer.com/

Again, thank you for posting in the SBS newsgroups. Please feel free to
contact us again in the future.

Have a nice day!


Best regards,

Robbin Meng(MSFT)

Microsoft CSS Online Newsgroup Support

Get Secure! - www.microsoft.com/security

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