I recently had an Exchange 2010 server fail and I have replaced it with a completely new Exchange 2013 server running on Server 2012 R2. I have been getting complaints that mail flow can be extremely slow. And by slow I mean it could be a day or more before
the recipient receives the message. And this is mail being sent from one user in our organization to another user in our organization. Can anyone think of why this is happening and I need to do to fix it?
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