Unable to receive emails from some customers.

[Loren220]

Hello,

I'm new to exchange and one of my clients is having the following issue.

This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

mycustomeremail@customeremail.com---I removed the actual e-mail to prevent possible future spam


retry time not reached for any host after a long failure period

This is a copy of the message, including all the headers. The body of the message is 228377 characters long; only the first 106496 or so are included here.



Some of my clients customers are unable to send them (my client) emails. The customers receive the error above in an returned e-mail. I have done some research and haven't found much on the issue and as far as I can see it doesn't look as if the e-mails are ever reaching my clients exchange server.

Thanks,

Lo

 

[ntinlin]

Check your MX records using something like mxtoolbox.com to see what internet DNS sees as the target server for external senders.

Also have you perhaps recently stopped using a 3rd party service like MessageLabs or Postini and changed server IP or similar?
I've seen it where the MX records were right but a domain was still registered with MessageLabs internal systems. Therefore MessageLabs customers would always use the old IP address rather than the MX record.

That one caused quite a bit of head scratching.

Without the message headers can't really tell you much.

 

[Loren220]

Below is the header information from the e-mail that is returned to the sender. The customer who can't receive e-mail recently let go their internal IT staff who handled their exchange server as well as other internal systems. I asked the customer if any changes were made to exchange server recently and they did not know of any but even if there were changes made no one was aware of it as the people that would know were let go.

Thanks,

Lo

-------- Original Message -------- Subject: Mail delivery failed: returning message to sender
Date: Fri, 04 Nov 2011 09:51:59 -0400

-- I blanked out customer info with XXX.com

From: Mail Delivery System <Mailer-Daemon@smtp-out.XXX.com>
To: XXX.com


This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

XXX@XXX.com retry time not reached for any host after a long failure period

------ This is a copy of the message, including all the headers. ------
------ The body of the message is 228377 characters long; only the first
------ 106496 or so are included here.

Return-path: <XXX@XXX.com>
Received: from pcr.densiseldrum.com ([10.1.20.110])
by fca.densi.com with esmtp (Exim 4.74)
(envelope-from <XXX@XXX.com>)
id 1RMKBb-0006Qv-Ca
for XXX@XXX.com; Fri, 04 Nov 2011 09:51:59 -0400
Message-ID: <4EB3EDFF.7090801@XXX.com>
Date: Fri, 04 Nov 2011 09:51:59 -0400
From: XXX@XXX.com
User-Agent: Mozilla/5.0 (Windows NT 5.2; rv:7.0) Gecko/20110922 Thunderbird/7.0
MIME-Version: 1.0
To: XXX@XXX.com
Subject: Fwd: Fwd: Mail delivery failed: returning message to sender
References: <4EB3EC01.3020007@XXX.com>
In-Reply-To: <4EB3EC01.3020007@XXX.com>
X-Forwarded-Message-Id: <4EB3EC01.3020007@XXX.com>
Content-Type: multipart/alternative;
boundary="------------040900070409030804000801"

This is a multi-part message in MIME format.
--------------040900070409030804000801
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: quoted-printable