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Undeliverable Mail

cody426
cody426 asked
on
Medium Priority
332 Views
Last Modified: 2013-11-30
Hi All,

A company I work with cannot send mail to my domain, when they attempt to send to my domain they get the following.

"Undeliverable: Your message did not reach some or all of the intended recipients.

      Subject:      FW: Test from
      Sent:      6/26/2009 2:23 PM

The following recipient(s) cannot be reached:

      user@mydomain.com on 6/26/2009 10:29 PM
            Could not deliver the message in the time limit specified.  Please retry or contact your administrator.
            <server.theirdomain.local #4.4.7>

      anotheruser@mydomain.com on 6/26/2009 10:29 PM
            Could not deliver the message in the time limit specified.  Please retry or contact your administrator.
            <server.theirdomain.local #4.4.7>"

Their IT group has told the users getting NDRs that it is something on my end that is preventing the mail from going through.  I am looking for advice to figure out what the problem is, we had just recently switched ISP's and I suspect it may have something to do with that.  

Thanks
-Cody
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Alan HardistyCo-Owner
CERTIFIED EXPERT
Top Expert 2011

Commented:
Do mails get delivered directly to your mail server?
If so, check you MX records on http://www.mxtoolbox.com/
Do the MX record(s) point to your IP Address?
Test Mail connectivity on http://www.mxtoolbox.com/diagnostic.aspx to see if your mail server is contactable.
Check your external IP Address is what you expect it to be on http://www.whatismyip.com
If your emails get delivered to a 3rd party first, call them to see if they have problems.
Are you using any spam / Anti-Virus filtering software?

Author

Commented:
alanhardisty;

Mail does go directly to my server. the MXrecord looks correct (my IP).

The SMTP Diag seemed good as well, here is what I got.

RESULT: mail.mydomain.com
Banner: 220 mail.mydomain.com Microsoft ESMTP MAIL Service, Version: 6.0.3790.3959 ready at Mon, 29 Jun 2009 10:18:24 -0700
Connect Time: 0 seconds - Good
Transaction Time: 0.344 seconds - Good
Relay Check: OK - This server is not an open relay.
Rev DNS Check: OK - XXX.XXX.XXX.5 resolves to mail.mydomain.com
GeoCode Info: Geocoding server is unavailable
Session Transcript: HELO please-read-policy.mxtoolbox.com
250 mail.mydomain.com Hello [64.20.227.13 [78 ms]
MAIL FROM: <test@mxtoolbox.com>
250 2.1.0 test@mxtoolbox.com....Sender [94 ms]
RCPT TO: <test@mxtoolbox.com>
550 5.7.1 Unable to relay for test@mxtoolbox.c [78 ms]
QUIT
221 2.0.0 mail.mydomain.com Service closing transmission chann [94 ms]
 
I do not work with any third party email providers.  I had run these tests previous to posting here and after reading many other posts, and from what I see they seem fine, maybe I'm missing something.

I am using AVG 8.5 on the Exchange server.  This server has been running for over a year now with no confiugration changes besides the AV (switched from Symantec 10.2 to AVG) which was changed about 5 months back.  This is the only domain I am aware of that gets NDR's when sending to my domain.

Thanks
-Cody
Alan HardistyCo-Owner
CERTIFIED EXPERT
Top Expert 2011

Commented:
Did you check your current IP on www.whatismyip.com ?
Can you email your domain details, your Internet IP address, the domain name / IP of the company having problems sending you emails please - details in my profile.
Co-Owner
CERTIFIED EXPERT
Top Expert 2011
Commented:
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Author

Commented:
It has been almost 2 weeks since the change in ISP, and no other domains have contected me about the inibility to send.

Thanks
-Cody
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