Posts Tagged ‘SMTP’

Exchange 2010 Queue – 421 4.2.2 Connection dropped due to SocketError

October 5th, 2011


Exchange 2010 messages stuck in queue with 421 4.2.2 Connection dropped due to SocketError
Keywords: Exchange 2010


Server 2008, Exchange 2010 with all current rollups, Cisco ASA Firewall


Messages would sit in the Exchange 2010 Queue with 421 4.2.2 Connection dropped due to SocketError . Many messages would eventually deliver, but only after sending delay messages to the originator. This would only impact certain messages not all messages to a certain domain. It also affected inbound as well as outbound messages. So there were a number of complaints that users were not receiving messages from certain users.


After doing a lot of research, the common thread that I found was that everyone experiencing this issue had Cisco ASA firewalls and disabling the ESMTP Service resolved most of the issues. I spoke with my network admin and had the service disabled. Instantaneously my queues shrunk to near nothing resolving all of these issues. Reports of people not getting email also stopped. I do not have specifics on how to disable the service, but you should be able to find the information out there.

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dyndns mailhop outbound setup for small business server 2003

September 28th, 2011

I had to configure a Small Business Server 2003 for the dyndns mailhop outbound service.  I did a lot of searching finding good instructions.  I found this post which had all the steps necessary for me.

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