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<blockquote type="cite" cite="mid:ZVR7Tl0YfPMoxkcb@fantomas.sk">This
in my understanding generates failure reports for any forwarded
mail including any mail to lists that do not completely rewrite
From:
<br>
(including this one mailing list)
<br>
<br>
- even if DKIM is preserved and valid, such mail won't generate
aligned SPF pass
<br>
<br>
unless you have better explanation of that section...
</blockquote>
<p>fo is for debugging. If someone defines fo for their domain and
gets a bunch of failure reports, they get what they wished for.
The mailing list itself does not have to process those failure
reports, nor is the mailing list penalized for it.<br>
</p>
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