Post in evidenza

Recovery - Access, Excel, Word, Office and Photo recovery tools and other blog procedures

During these years I had necessity to recover various files (.doc, mdb, .xls, photos...)  I utilized various free tools (here is an exampl...

Exchange 2007/10 - “ 451 4.7.0 Timeout Queues Timeout”

During last years we faced to a very strange problem along Exchange queues that got stacked with a rarely and particular error:



“ 451 4.7.0 Timeout”

To better undestand where it was problem we enabled verbose logging on each Exchange server Hub Transport that faced problems to send intrasite and externally emails:


http://1.bp.blogspot.com/-MxmF39ZvmSE/VMpanGCRbXI/AAAAAAAADPo/x0cP4sCxn3o/s1600/1.jpg



There was “ 451 4.7.0 Timeout” as you can see.

Then we executed ping command with a particular parameter to understand if there was some packed dropped during connection:

And ping computer_name or IP_address -f -l 1472 was unsuccessfully. (http://support2.microsoft.com/kb/159211/en-us )

So, following this article, we understood that it was a networking problem and we opened a major case to MPLS provider and we solved after their intervention.


[update 2016.06.07]

Here they are articles about MTU and ping parameter and how to enable verbose logging on exchange server about send/receive connectors


How to Troubleshoot Black Hole Router Issues

SMTP Routing in Exchange 2010 (Part 4)

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