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Rick Ranck

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Exchange Queue Stuck

We attempted to send a large amount of email out to our customers last night through our Exchange 2016 server. Everything went well except for a single queue, comcast.net. It sent the majority of the email out, however it is now stuck with the attached image. We have already restarted the transport service as an attempt to correct the issue. Any advice would be greatly appreciated.

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Wayne88
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Are you sure the recipient's domain are valid?  Check and verify the MX using this tool.  Check a few of them.

https://mxtoolbox.com/
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Rick Ranck

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