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MS Exchange 2013 failed to send e-mail batch from 3-rd party program

Hello experts.
I have a 3-rd party program, which connect to CAS server thru smtp for sending batch of e-mails. It began to work, but after 30-40 e-mails stop transfering, with "remote socket error" in CAS`s receive connector logs. I checked default frontend receive connector, and have changed "maxinboundconnectionspersource" from 20 (default) to unlimited and "maxinboundconnectionpercentagepersource" from 2 to 100% still without success. Before ms exchange 2013 has exchange 2010 with the same parameters on CAS/HUB default receive connector and all worked fine.
Please help to resolve this issue.
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ameriaadmin
Asked:
ameriaadmin
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2 Solutions
 
Adam FarageEnterprise ArchCommented:
On the CAS check for backpressure by searching the Event Viewer: Application logs for the following Event ID's..

- Event ID 15004 - 15007, all should be MSExchangeTransport as the source, Resource Manager for the category.
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ameriaadminAuthor Commented:
Dear Adam, I`ll check it. Now I am out of the office.
Want to make new receive connector especialy for this batch sending. In some articles read that this issue can rase because of bult-in anti-malware, which can`t process lot of e-mails at a time. How can I configure to stop using built-in anti-malware for that special receive connector?  And the other question, when I use this 3-rd party program, route is:
sending server --> CAS --> MBX --> ex2010 edge. What MBX doing here, if recepients are outside?
Best regards
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Adam FarageEnterprise ArchCommented:
The mailbox would do nothing.. it should go Exchange 2010 EDGE > CAS > Mailbox (for local delivery). If you are just relaying you relay off the CAS not the Mailbox role.
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ameriaadminAuthor Commented:
and what about anti-malware, can I configure it to not touching that receive connector?
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