> A) You don't need to split transactional and personal mail into separate
> domains, because stuff like mailing lists that would cause DMARC problems
> is in fact whitelisted.

asked again:

I have a domain used by individuals and also for transactional mails. (the 
company brand ...)
I setup spf and dkim sign all mail.

How will a receiver distinguish a legit mail resent via a mailing list
( spf fail & dkim is broken by the listserver, equals to no dkim at all)
from a forged email from a spamsender
( spf fail & no dkim signature at all)

I am also in the role of a receiver.
How do I reliable identify mailing-lists? Where is a definition?

Thanks
Andreas

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