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Dequeue email

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Dequeue email - 31.Dec.2008 10:38:21 PM   


Posts: 8
Joined: 9.Aug.2003
From: italy
Status: offline
I searched the web in every direction but I am not able to pinpoint exactly how to do this.

As you know you can have a secondary mx record pointing to an externally hosted backup mail server so that in case you MS SBS server goes down, email is still collected and stored for your domain.

Once your server is up again I read there is a mechanism call ETRN which sends a signal to the backup mail server to dequeue the email that was accumulated while your server was down.

I read a post by someone where I should create an additional SMTP connector with a schedule ETRN command to an external mail server.

But how is exchange 2003 going to work out which exchange connector to use when sending email? Because the 2 smtp connectors are using the same Exchange BridgeHead server?

Can someone clarify this for me and explain the right way to do it?

Thanks everyone and Happy 2009
Post #: 1
RE: Dequeue email - 1.Jan.2009 1:39:00 AM   


Posts: 8232
Joined: 7.Jan.2004
From: California, USA
Status: offline
It's more typical that the secondary server does one of two things.  Either it continually attempts to forward the messages to the primary (but doesn't complain if it can't communicate with it), or it doesn't attempt to anything automatically with the messages received.  In the first case, when the primary comes back online the messages are forwarded.  In the second case, you have to manually instruct the secondary to forward.

Why you'd choose one over the other depends upon how confident you are of restoring service before messages time out.  That being said, you should be able to control the duration of retry attempts from the secondary server.

It is not as common that the primary requests the queued messages to be delivered.



Dean T. Uemura
Microsoft MVP - Exchange (2007-2011)

(in reply to zaxatron)
Post #: 2

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