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The Microsoft Exchange Transport service is rejecting message submissions

Customers Exchange was running fine until Yesterday, now mail is not sending or recieving
getting this error in errlor log, no help from Microsoft
Have check all i know and still having the same issue.

Please Help!!!

The Microsoft Exchange Transport service is rejecting message submissions because the service continues to consume more memory than the configured threshold.

Resource utilization of the following resources exceed the normal level:
Private bytes = 77% [High] [Normal=71% Medium=73% High=75%]
Physical memory load = 97% [limit is 94% before message dehydration occurs.]

Back pressure caused the following components to be disabled:
Inbound mail submission from Hub Transport servers
Inbound mail submission from the Internet
Mail submission from the Pickup directory
Mail submission from the Replay directory
Mail submission from Mailbox servers
Loading of e-mail from the queuing database (if available)

The following resources are in the normal state:
Queue database and disk space ("C:\Program Files\Microsoft\Exchange Server\TransportRoles\data\Queue\mail.que") = 12% [Normal] [Normal=95% Medium=97% High=99%]
Queue database logging disk space ("C:\Program Files\Microsoft\Exchange Server\TransportRoles\data\Queue\") = 16% [Normal] [Normal=95% Medium=97% High=99%]
Version buckets = 0 [Normal] [Normal=80 Medium=120 High=200]

For more information, see Help and Support Center at
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1 Solution
The issue that you are facing is due to Back Pressure. See what happens is that if server resources like Memory/hard disk etc fall below a certain level then Exchnge 207 disables a few services one by one till resources are availabel again.
This shouuld help you:
JoecoraceAuthor Commented:
Thank you for your help
Glad to help
Nitin Gupta (gupnit)

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