>Exactly how to patch this depends on what Mailman version you're
>starting with, but you basically want some code like this.
>
> name, addrs = parseaddr(msg.get('from'))
> addrs += '.invalid'
> del msg['from']
> msg['From'] = formataddr((name, addrs))
>
>If you put it in Mailman/Handlers/Cleanse.py or
>Mailman/Handlers/CookHeaders.py, parseaddr and formataddr are already
>imported from email.Utils so the above 4 lines added to the
>process(mlist, msg, msgdata) function are all you need.
How do you limit it to just addresses with DMARC problems? There's no
benefit to doing it to everyone.
R's,
John
PS: My experiments have been with mj2 because I know the code better.
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