Solved

Have any about a Delivery Status Notification (Failure) code 501

Posted on 2008-10-23
4
1,205 Views
Last Modified: 2013-11-30
We are receiving the following delivery status notification when we are sending e-mails to a specific domain, let's say domain.com.
The error message is:
"The following recipient(s) could not be reached:
      Krrrrr@domain.com on 10/23/2008 12:07 PM
            There was a SMTP communication problem with the recipient's email server.  Please contact your system administrator.
            <mail.mydomain.com #5.5.0 smtp;501 Failure Bad FROM MX record (cached), Setting G_BADFROM_NOIP> "
I have to specify that we are using our own smtp server (not ISP's server) that is behind a FW in DMZ, while our domain DNS records are administred by our ISP. Have you any ideea about this DSN error?
0
Comment
Question by:stefan75
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
4 Comments
 
LVL 3

Expert Comment

by:Karl12347
ID: 22784569
It looks like your exchange server is having problems communicating out to the internet. make sure you have host A records for you ISP service provider in your DNS and also that the correct MX records are in you dns.

Hope this helps.
Karl
0
 
LVL 10

Expert Comment

by:Rudram
ID: 22784575
0
 

Author Comment

by:stefan75
ID: 22785056
In fact we are sending external e-mails using a GFI server (in DMZ). Exchange is used only as a local mailserver that is forwarding the external messages to the GFI server. We are receiving emails using another server (an external one), which for the MX record is setup correctly in our DNS. The A and MX records are correctely setup in our DNS. Reverse DNS lookup is setup to point to our smtp (outbound) server that is different then our MX (inbound) server. We're receiving the specified DSN error only when we're sending emails to one particular domain (but we care receive e-mails from it).
0
 
LVL 3

Accepted Solution

by:
Karl12347 earned 125 total points
ID: 22785531
if it is only one specific domain, have you tried to contact them to see if they are having issues.

Use a MX record lookup website on the internet and then check that the emails are going via the correct path on the internet by using a Tracert or MSlookup.

I have come across problems were the recipents have a static dns entry for our exchange server but then we changed some of our infrastructure and the emails would not work correctly.

definatly sounds like a routing issue on the internet.
Regards
Karl
0

Featured Post

Revamp Your Training Process

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article explains in simple steps how to renew expiring Exchange Server Internal Transport Certificate.
Unified and professional email signatures help maintain a consistent company brand image to the outside world. This article shows how to create an email signature in Exchange Server 2010 using a transport rule and how to overcome native limitations …
To show how to generate a certificate request in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.:  First we need to log into the Exchange Admin Center. Navigate to the Servers >> Certificates…
The basic steps you have just learned will be implemented in this video. The basic steps are shown to configure an Exchange DAG in a live working Exchange Server Environment and manage the same (Exchange Server 2010 Software is used in a Windows Ser…

734 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question