Event ID - 31040

Event Id31040
DescriptionNo valid message recipients in message.
Event InformationAccording to Microsoft:
When the Notes recipient replies to the message using a Notes R5 client, Notes removes the display name from the transport Internet address encapsulated by Exchange Server or Exchange 2000 and encloses the Internet address portion in angle brackets. The resulting address appears in a format similar to one of the following:
The Exchange Notes Connector does not recognize explicitly encapsulated Internet addresses that contain angle brackets, but no display name, as in the first example above. In addition, the Exchange Notes Connector does not recognize implicitly encapsulated SMTP addresses that contain angle brackets, as in the second example above.
To resolve this problem, obtain the latest service pack for Exchange Server 5.5.
Reference LinksXFOR: Notes R5 Recipient Cannot Reply to SMTP Message Sent Through Internet Mail Service or SMTP Connector

XFOR: Notes Connector Rejects Incoming Messages with the Apostrophe () Character in the SMTP Address

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