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Delayed message delivery on SBS2011

Posted on 2013-12-17
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Last Modified: 2013-12-21
This is using MS SBS2011 exchange server. My user told me that he got the delayed mail delivery for mails attempted to send to few domains. The error message:

  451 4.4.0 Primary target IP address responded with: "421 4.4.2, connection dropped due to socketerror. "attempted failover to alternate host, but that did not succeeded. Either there are no alternate host, or delivery failed to all hosted host.

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Question by:MichaelBalack
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