Github user sebbASF commented on the issue:
https://github.com/apache/incubator-ponymail/issues/398
Huh? Valid source messages can end in trailing whitespace.
If the different archivers are presented with inputs that only differ in
the amount of trailing whitespace, at most one of the inputs properly
represents the original message.
If these inputs all generate the same id then the last one to be posted
wins.
There is no guarantee that this is the correct representation.
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