Microsoft KB Archive/261414

= XCON: Internet Mail Service Queues Become Backlogged During Business Hours =

Article ID: 261414

Article Last Modified on 10/27/2006

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APPLIES TO


 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q261414



SYMPTOMS
Even though messages are flowing, the Internet Mail Service queue levels may rise steadily during the day, with no indication that any errors have occurred. These same queues may clear out overnight, but they fill again the next day.



CAUSE
This behavior can occur when messages are being created faster than they can be sent. If a business processes a large number of messages, its connection can outpace the available bandwidth. If this is the cause of this behavior in your particular scenario, the message backlog should begin to clear shortly after the time of day that most of your users log off.

In certain cases, such as with companies that have 24-hour business schedules, the queues may never clear; they can continue to build and can eventually create drive-space errors or other related errors.



RESOLUTION
To resolve this issue, increase either your connection speed, the number of available connections, the number of Internet Mail Service connectors, or your bandwidth.

Additional query words: bandwidth, transfer rate,

Keywords: kbprb KB261414

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