Microsoft Exchange 2007 4.3.1 Insufficient System Resources

I am getting 4.3.1 Insufficient System Resources error when submitting large emails (>500kb with attachments) on Exchange server. Back pressure is disabled and no alerts come up in the Events (Microsoft Server 2008). There is >4gb disk space on the system drive and 120gb of the drive where queue database/mail database is located. I have recently moved mailbox database and data storage directory from the system drive to the secondary drive.

What can be causing this error?
icexxikAsked:
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AmitConnect With a Mentor IT ArchitectCommented:
Do you see below warning message

Event Type: Warning

Event Source: MSExchangeTransport

Event Category: ResourceManager

Event ID: 15002

Moving the queue to other folder can resolve this issue normally
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AmitIT ArchitectCommented:
Restart MSExchangeTransport service. Check the results
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AmitIT ArchitectCommented:
Check application logs after restarting the service and post it here.
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AmitIT ArchitectCommented:
Will take care

Thanks
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Alan HardistyCo-OwnerCommented:
Thank you.

Alan
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icexxikAuthor Commented:
The pronlem was with temporary folder. Solved by running move-transportdatabase.ps1 and moving the tmp dbase. For the future, this error does not show up on logs and is very hard to diagnose.
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AmitIT ArchitectCommented:
Good, so after changing the queue database folder path issue got resolved. What I suggested in 35156807 post. Do you agree.
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Blue Street TechLast KnightsCommented:
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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