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Unable to send into a specific external email domain - Delivery is delayed to these recipients or groups ?

Posted on 2015-02-12
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Last Modified: 2015-06-23
When I tried to send email to a specific email domain from my company to external emal address, it is not getting through on the same day.
Instead i get this error message:

Delivery is delayed to these recipients or groups:
This message hasn't been delivered yet. Delivery will continue to be attempted.

I can see that there is no problem with Exchange Server 2010 email queue or any other email domain, but just to this one and some other ones.

So how can I verify that it is not our email infrastructure problem ?

Where to start for the troubleshooting ?
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14 Comments
 
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Assisted Solution

by:Deadman
Deadman earned 125 total points
ID: 40607343
Check your server is blacklisted here and also check your event viewer system and application log for Exchange related warnings and or errors.

And also check there might be a problem by the receiver end or recepient. If the message cannot be delivered within 48 hours you will receive an error message why the mail is not delivered.
You can take lead from that error message to resolve this issue.

Is there recently any changes made in public dns hosting?
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Author Comment

by:Senior IT System Engineer
ID: 40607366
I have verified that both sides of email server is not black listed from MXToolbox website.
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Author Comment

by:Senior IT System Engineer
ID: 40607367
Public DNS ?
On which side do you mean ?
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Expert Comment

by:Deadman
ID: 40607375
any changes made in Public DNS or web hosting at your end
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Assisted Solution

by:Manoj Bojewar
Manoj Bojewar earned 125 total points
ID: 40607412
Please do one more thing,

Telnet mx record (IP address)  of any domain from exchange hub/Edge server which mails getting delay and see you are able to connect or getting any banner error message.
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Author Comment

by:Senior IT System Engineer
ID: 40607523
Hi manoj,

How do I do it if I don't know the name of the email server on the target email domain ?
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Assisted Solution

by:Guy Lidbetter
Guy Lidbetter earned 250 total points
ID: 40612310
Have you seen these emails being delayed in your own Queue viewer?

Are they being delivered eventually or not at all?

A few points to check:
Make sure you have a pointer record for your mail domain (I.E. a reverse lookup of your external IP address provides the same domain name you are sending from)
You are not using a smarthost that is causing the delay (Message labs externally or ironports internally)
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Author Comment

by:Senior IT System Engineer
ID: 40612850
Guy,

There is no email queue at all on the Hub servers.

I also using smarthost internally with Symantec bright mail or Mail security virtual appliance. It is not classified as spam I've checked that also.

I'm not sure and still puzzled as to why only to this domain not delivered while the rest of the world is ok.
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Expert Comment

by:Guy Lidbetter
ID: 40613592
Are you receiving and NDR eventually or is it going through after an extended delay?
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Author Comment

by:Senior IT System Engineer
ID: 40613624
After some times so it is not instant.
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Accepted Solution

by:
Guy Lidbetter earned 250 total points
ID: 40614077
Then I'm guessing you need to check your smart host queues to see if they are delaying delivery.. alternatively it may be the client side causing mailbox delivery delay.

Either way you need to check the transport logs\queues on the smarthosts.

Can you provide the full error message you do receive?
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Expert Comment

by:subhash pawar
ID: 40844739
hi
 
 I am facing the delivery delayed issue when we send mail to external domain email .
Please suggest me on this issue

when i check the delivery error in  queue viewer its showing 4.7... like error
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Expert Comment

by:subhash pawar
ID: 40844742
I am using exchange 2010 on server 2012
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Expert Comment

by:Guy Lidbetter
ID: 40846338
@subhash pawar : Please log another ticket with more info regarding your issue. This thread is closed.
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