Exchange 2010 - email flow problem

Hi Guys,

I am experiencing internal email flow issues in my organization.

User A sends email to user B and C and sometimes they received and sometimes not.

The messaging tracking tool shows the emails as pending or unsuccessful:

15/11/2013 15:01 hq-cas2
Delivery for this message is delayed. The system will continue trying to deliver the message.

15/11/2013 15:31 hq-cas2
Delivery for this message is delayed. The system will continue trying to deliver the message.

In the The event viewer in hq-cas2 shows eventID 8010 - Remote Delivery ( see attached ).

I got a CAS array ( HQ-CAS1 adn HQ-CAS2 ) both have the transport role installed, problem happens on both servers.

Any ideas ?
Who is Participating?
JayCarter82Connect With a Mentor Commented:
Are these servers running server 2012 at all? If so, it appears to be a bug acknowledged by Microsoft, according to this thread:

Hotfix rollup 2 for SP3 here:

Try installing that and give them a reboot?
Are the recipient mailboxes full??
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R2_D2Author Commented:

I ran the "Get-MailboxStatistics" command and to check the mailboxes size and they all are below the limit.

Also, when i look into the "queue viewer" there are a couple of emails stuck in the submission queue with the "A storage transient failure has occurred during content conversasion" error.
nashim khanConnect With a Mentor Exchange AdministratorCommented:
Any news?
R2_D2Author Commented:
It seems JayCarter got it right.

I followed the instructions from this link

I am going to wait at the end of today just to make sure that users are happy.
then i will close this ticket.
That's great, really pleased to hear that :)
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