Event ID - 756

Event Id756
SourceSMTPSVC
DescriptionThe description for Event ID ( 756 ) in Source ( smtpsvc ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. The following information is part of the event: 5.1.1, rfc822;, .
Event InformationAccording to the information from a news group post:
This event will be seen in event log in associated with event id 4000 and 4001, when ever a bad smtp address sent out or received by the server. Followed by a server crash and rebuild this may observed. If you install service pack 3 and forgot to reinstall this after the server crash and rebuild, you may face this problem. Install this service pack will fix this problem.

Resolution:
Try bringing your SBS2000 server up to date on all windows updates and service packs. If that doesn't work, try re-installing the SMTP Service from "add/remove programs", then Windows components. A simple reinstall of the SMTP service should do the trick.
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