exchange, hub 2010

we have lately journaling emails piled up  on our hub servers which goes to mimecast

we have 7 hub servers and queues are piling on all.

earlier we had mcafee gateway but we switched to proofpoint gateway

after that journaling emails are using sendconnectors on our hub server

whoes next hop is proofpoint which is used by normal mail queues but instead it is being used by journaling emails

we have seperate mimecast journaling send connector which it should use

but instead it is taking send connector whose next hop is proof point

and PP is not having any send connector

For Journal email next hop is Edge server and that is different send connector for that, and edge IP is added to Mimecast , so now since PP gateway IP is not added to mimecast it is not making connection to send journal email to mimecast,



we spoke with microsoft he suggested to recreate the send connector but I did not agreed on this as it could lead to downtime for few min.

any other thoughts.

i took this from queue viewer.

Last Error: 400 4.4.7 The server responded with: 550 5.1.1 User Unknown. The failure was replaced by a retry response because the message was marked for retry if rejected.
pramod1Asked:
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Hasin Ahmed ChoudharyExchange AdministratorCommented:
Are journaling email send to particular domain ?
What is send connector cost value for pp?
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pramod1Author Commented:
journaling emails are sent through journaling  smart host to mimecast .

pp does not have send connector for journal emails but journal emails are getting routed and is in retry state on that send connector
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AmitIT ArchitectCommented:
You create new connector first, wait for sometime, normally 15 mins for AD replication. Then you can disable old connector, your downtime will be zero. Do it after off hours.
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Hasin Ahmed ChoudharyExchange AdministratorCommented:
Is PP send connector smart hosts based or domain n based ? Out of all connectors, have hub transport will select matching connector and try to relay email.

If there is * connector and no specific connector for journalling domain , it will use * connector , smarthost set on that connector will not accept this email and reject it..
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Hasin Ahmed ChoudharyExchange AdministratorCommented:
If MS have review the setting and asked to create new connector, you should be following that.

Ideally there will no downtime as this are journalling email and email will just pile up for while.

Agree with Amit, create connector  in disabled state and enable it off hours .
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pramod1Author Commented:
WE HAVE SMART HOST CONNECTOR FOR JOURNALING EMAILS.

BUT THE CONNECTOR JOURNALING EMAILS ARE USING ARE * CONNECTOR AND ROUTED TO PP  AND GETTING REJECTED
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Hasin Ahmed ChoudharyExchange AdministratorCommented:
Compare the cost  and source servers for both connectors .

Selection depends on many criteria. Follow this link and find out which parameter is prompting to use that * connector instead is specific smarthost connector.

https://technet.microsoft.com/en-us/library/bb232045(v=exchg.160).aspx
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pramod1Author Commented:
how to find what is the cost of the send connector
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