Slow Attachment receiving in Exchange 2007 - FIXED
Since moving from Exchange 2003 on Server 2003 we have had random issues with Exchange 2007/Server 2008 and attachments.
text only emails are fast and responsive from all domains
Small attachments, under 100K, seem to only take a few minutes.
Large attachments, above 1.5MB, will often not be accepted and generate a 4.4.2 Connection Dropped message.
We spent hours on the phone with MS support and they blamed our Network, NIC, Firewall, gremlins, etc...
I did a lot of searching on the net and found that many people are experiencing this issue and that most have been unable to resolve it.
I found a thread about setting the tarpitinterval 00:00:00 and tested it on the clients server - fixed the problem completely.
With it set to a ANY value other than 00:00:00, the larger attachments just die - the exchange diagnostics show that the data is corrupted and requests that it be resent - on the senders side it appears that the the message never leaves the sending queue
and eventually dies with a NDR.
So, the fix was to enter this command and then restart the transport service: (command is broken across two lines since I use a real Usenet client with 72 character line limit)
Set-ReceiveConnector "Internet Receive Connector" -tarpitinterval 00:00:00
Hope this helps others.
You can't trust your best friends, your five senses, only the little voice inside you that most civilians don't even hear -- Listen to that. Trust yourself.
spam999free@rrohio.com (remove 999 for proper email address)
February 17th, 2011 5:30pm