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Delay Notices and undeliverable emails

Posted on 2006-06-23
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Last Modified: 2012-06-21
I am having an interesting issue with email from our Exchange 2003 server. Not all but only a handful of emails are being delayed and undleliverable. I thought I had a rDNS issue and had my ISP ad the PTR record. I ran a report at DNSReport.com on our domain, postallogistics.com, and other than a couple warnings it tells me that I am good to go. The server is up to date with service packs, running symantec anti-virus. The only thing that has changed in the past few months is my T1 provider (SBC now). This issue has been going on for a couple weeks now. Just fixed the rDNS this week.

Any ideas?
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Question by:bkeintz
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Sembee earned 200 total points
ID: 16972020
Your server isn't announcing itself correctly. That will cause messages to be dropped.

http://www.dnsreport.com/tools/dnsreport.ch?domain=postallogistics.com

MAIL.postallogistics.com claims to be non-existent host pl1.postallogistics.com:
220 pl1.postallogistics.com Microsoft ESMTP MAIL Service, Version: 6.0.3790.1830 ready at Fri, 23 Jun 2006 14:32:19 -0500

Change it in ESM, Servers, <your server>, Protocols, SMTP. Right click on Default SMTP VS and choose Properties. Click on the last tab Delivery and then Advanced. Change the entry in the box FQDN to mail.postallogistics.com

SPF record may also help, but that will not cause NDRs.

Simon.
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Author Comment

by:bkeintz
ID: 16972166
I changed the SMTP VS FQDN to mail.postallogistics.com and the warning went away on the
 
http://www.dnsreport.com/tools/dnsreport.ch?domain=postallogistics.com 

But the problem persistis.
Just sent out a test email and just got the delay Notification.
 
I guess i'll try and set up the SPF record.
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LVL 104

Expert Comment

by:Sembee
ID: 16972188
I would be very surprised if the SPF record would fix the issue, as no one in their right mind is using that as a prime source. Plus delay warnings mean just that - a delay. What you really need is the fatal message to see what the error is.

Simon.
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Author Comment

by:bkeintz
ID: 16972398
I added an SPF record just like this site explains http://www.michaelbrumm.com/spfwindowsdns/ but it isn't showing up on the report yet.
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Author Comment

by:bkeintz
ID: 16972750
Well so far I have not recieved the failure message yet. Here is a copy of the delay notice mssage:
Reporting-MTA: dns;mail.postallogistics.com

Final-Recipient: rfc822;naval.rajpurkar@circle8logistics.com
Action: delayed
Status: 4.4.7
Will-Retry-Until: Fri, 23 Jun 2006 16:39:15 -0500
X-Display-Name: 'naval.rajpurkar@circle8logistics.com'

If I am not mistaken -0500 would be EST right?
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Author Comment

by:bkeintz
ID: 16972781
The report on the company I am trying to send to is ugly http://www.dnsreport.com/tools/dnsreport.ch?domain=circle8logistics.com
But they claim that they are sending and recieving just fine from everyone but us or I should sayrecieving from us they can send to us.

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LVL 104

Expert Comment

by:Sembee
ID: 16974353
You can make rather large errors in DNS records and get email delivered to you correctly. It would start to cause problems with sending email, but they may not notice or care - especially if they don't send email to any domains that are picky about who they accept messages from (aol.com for example).

I am not surprised that they claim to have no problems with anyone else, most people will claim that unless they are told there is an issue.

If you continue to get problems then the only thing I can suggest is to use an SMTP Connector to route email for that domain through your ISPs SMTP server.
http://www.amset.info/exchange/smtp-connector.asp

Simon.
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Author Comment

by:bkeintz
ID: 16984352
Thanks Again. This is working like a charm.
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