Solved

SMTPDiag Error 250

Posted on 2006-02-21
9
5,711 Views
Last Modified: 2012-06-27
OK everyone, I need help.

When sending an email, we are receiving an NDR back. I have confirmed that the email is good by sending to different email accounts on different networks. My feeling is that we are being blocked by the receiving side. But I am worried that either my firewall or exchange filters could be causing this.

I ran SMTPdiag and here is the results from that test


Searching for Exchange external DNS settings.
Computer name is CVSCALLAP.

Checking SOA for culaneenergycorp.com.
Checking external DNS servers.
Checking internal DNS servers.
SOA serial number match: Passed.

Checking local domain records.
Checking MX records using TCP: mccrums.ab.ca.
Checking MX records using UDP: mccrums.ab.ca.
Both TCP and UDP queries succeeded. Local DNS test passed.

Checking remote domain records.
Checking MX records using TCP: culaneenergycorp.com.
Checking MX records using UDP: culaneenergycorp.com.
Both TCP and UDP queries succeeded. Remote DNS test passed.

Checking MX servers listed for @culaneenergycorp.com.
Connecting to mix.twistedpair.ca [216.83.0.4] on port 25.
Error: Expected "250". Server rejected the recipient address.
Failed to submit mail to mix.twistedpair.ca.

Im sure I have not included enough informtion for you to help. But this is a start.


ssiimmppllee






0
Comment
Question by:ssiimmppllee
  • 4
  • 3
  • 2
9 Comments
 
LVL 24

Expert Comment

by:flyguybob
ID: 16011414
Out of curiosity, do you have a PTR record for the system that will be sending the mail?
0
 
LVL 104

Expert Comment

by:Sembee
ID: 16014040
It would help more if you posted what was the NDR that the users get when they send an email message. This usually gives more of an idea about the cause of the problem.

If your domain is mccrums.ab.ca then the DNS report shows up some interesting points...
http://www.dnsreport.com/tools/dnsreport.ch?domain=mccrums.ab.ca


You are announcing yourself as an invalid host...

mail.mccrums.ab.ca claims to be non-existent host mccal2.MCCRUMS.LOCAL:
220 mccal2.MCCRUMS.LOCAL Microsoft ESMTP MAIL Service, Version: 6.0.3790.1830 ready at Tue, 21 Feb 2006 16:41:32 -0700

and your reverse DNS points to an IP address with Shaw Cable.

Those two facts alone would be enough for some sites to reject your connection.

Simon.
0
 
LVL 1

Author Comment

by:ssiimmppllee
ID: 16014636
Sorry for not responding. I have been running around to other clients all day. The DNS report does show some interesting info. For example

"" FAIL All nameservers respond ERROR: Some of your nameservers listed at the parent nameservers did not respond. The ones that did not respond are:

216.251.32.100


Note: If you are running a Watchguard Firebox with DNS Proxy enabled, there may be a bug causing port numbers get mixed up -- if this is the case, you can contact Watchguard to see if they have a fix. ""


The client is infact running a Watchguard Firebox. I will need to confirm if the DNS proxy is enabled.


HEre is the NDR
Your message did not reach some or all of the intended recipients.

Subject: test: please reply
Sent: 21/02/2006 11:24 AM

The following recipient(s) could not be reached:

  'dstaus@culaneenergycorp.com' on 2/21/2006 11:24 AM
  There was a SMTP communication problem with the recipient's email server. Please contact your system administrator.
  <mccal2.MCCRUMS.LOCAL #5.5.0 smtp;554 Service unavailable; Client host [68.144.64.123] blocked using dul.dnsbl.sorbs.net; Dynamic IP Addresses See: http://www.sorbs.net/lookup.shtml?68.144.64.123

I will check these facts tomorrow.
0
Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

 
LVL 104

Accepted Solution

by:
Sembee earned 500 total points
ID: 16014841
This is the problem:

blocked using dul.dnsbl.sorbs.net; Dynamic IP Addresses See: http://www.sorbs.net/lookup.shtml?68.144.64.123

The remote site is using the SORBS dial up list. You can make all the changes you like but you will never be able to deliver email directly to that site.

You will need to setup an SMTP Connector to route email through your ISPs SMTP server.
http://www.amset.info/exchange/smtp-connector.asp

It will not do any harm to get the server announcing itself correctly though.

http://www.amset.info/exchange/dnsconfig.asp

Simon.
0
 
LVL 24

Expert Comment

by:flyguybob
ID: 16015085
I agree with Sembee regarding the information is in the NDR as well as the solution.
0
 
LVL 1

Author Comment

by:ssiimmppllee
ID: 16023974
I setup the SMTP connector to get up and running.

It turns out that Telus has not created a reverse DNS for us which is why SORBS black listed us. So now I am off to have this corrected. I will also clean up the rest of our DNS while I'm at it.

Thanks for you help.

ssiimmppllee
0
 
LVL 24

Expert Comment

by:flyguybob
ID: 16024041
Cool...so it goes back the the PTR record being needed.
0
 
LVL 1

Author Comment

by:ssiimmppllee
ID: 16024184
Ah shoot. Sorry flyguybob. It does go back to that. I should have shared this one.
0
 
LVL 24

Expert Comment

by:flyguybob
ID: 16025480
That does not bother me on bit...I am glad that you got it solved.
0

Featured Post

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

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

Exchange server is not supported in any cloud-hosted platform (other than Azure with Azure Premium Storage).
This article lists the top 5 free OST to PST Converter Tools. These tools save a lot of time for users when they want to convert OST to PST after their exchange server is no longer available or some other critical issue with exchange server or impor…
In this Micro Video tutorial you will learn the basics about Database Availability Groups and How to configure one using a live Exchange Server Environment. The video tutorial explains the basics of the Exchange server Database Availability grou…
The video tutorial explains the basics of the Exchange server Database Availability groups. The components of this video include: 1. Automatic Failover 2. Failover Clustering 3. Active Manager

777 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