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Slow emails on backend when frontend server is down

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TheCandyman

Technical User
Sep 9, 2002
761
US
I have a backend exchange server that forwards all email to another mail server and it's worked great for years. The front end server is currently having issues and when it goes off line the users email messages stick on the screen for a minute or two. It's almost like the backend(users)exchange server is just trying to pass the email and it can't, so it doesn't take it. Is there a way to have it quickly take the email message and then deliver when the other server comes back up? The exchange machine is a default setup except for forwarding "Forward all mail through this connector to the following smart hosts" instead of using "Use DNS to route to each address space on this computer"

Any suggestions?
 
so the Exchange server (backend) forwards all email to another Exchange server (backend)?
 
No. Clients connect to a back end Exchange server which connects to a front end Exchange server. Sorry for the confusion.
 
Does this happen when sending to a distribution list or sending a single email to another user?

If it happens to be a distribution list - your expansion server settings are probably pointing to the server that is no longer online. Change the expansion server setting to a server that is still online and bing! It will start going...

 
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