The xmail documentation says:
If this filters returns '4, 5 or 6' the message is rejected and is
stopped in its travel. If the filter modifies the message it must return '7'.
But, this info seems to be totally wrong, as only 0 and 3 is working
(plus adding 16 to it for stopping processing other filters).
What happened to xmail?
Anybody know if modifying the mail within a filter is (still) possible in v1.27
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