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Introduction
As an administrator you may desire to exclude a specific attachment file. A file can be uploaded to JEMHC which will generate a fingerprint (An MD5 hash) of the file, subsequent processed attachments that match this fingerprint will be excluded. Fingerprints are generated from the exact content of the file, if any part of the file is modified then the fingerprint will change. An image file for example may look identical to another file, but this is no guarantee that the fingerprints generated from both files will match.
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