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Ohio State University logo Office of Information Technology Technology Support Center (8help)

Listserv is bouncing messages due to checksum errors



When mail to a list is bouncing back with the following error:
    The following message was not processed due to the following reasons: The body of the message has a checksum matching those messages already processed.
it means that according to the listprocessor's records, that exact message has already been posted to that list before. The listprocessor uses what it calls checksums to keep track of what messages have already been posted to a list. This system is in place to prevent mail loops, delivery-errors, automatic-replies, and the like from mail bombing everyone subscribed to the list.

Most of the time this error is encountered, the message actually has been posted to the list before. If it needs to be posted again, the body of the text can be slightly altered (inserting a date in the body usually works) so that it generates a different checksum.

The listprocessor does make errors sometimes, and reject messages which actually haven't already been posted to the list. If this is the case, and its still giving a checksum error, try changing a small part of the body of the message should still allow the message to go through.

Current Record: 82

Create Date: 02-16-1999
Last Reviewed: 02-09-2004
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