The Exchange Server message transfer agent (MTA) may stop communicating with other MTAs on servers in the same site.
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This issue can occur if the MTA experiences a large number of connection failures over an extended period of time and loses connection resources that are necessary to connect to other MTAs in the site.
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To resolve this problem, obtain the latest service pack for Exchange Server 5.5. For additional information, click the following article number to view the article in the
Microsoft Knowledge Base:
191014�
XGEN: How to Obtain the latest Exchange Server 5.5 Service Pack
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To work around this issue, restart the MTA to reset any connection resources and enable the MTA to communicate with other MTAs in the same site.
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Microsoft has confirmed that this is a problem in Microsoft Exchange version 5.5. This problem was first corrected in Exchange Server 5.5 Service Pack 4.
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This issue does not cause any loss of communication between servers in different sites by using any connector (Site, X.400, SMTP, and so on).
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