Re: how to fix this issue-spam

[Reindl Harald]

Am 04.02.2016 um 16:49 schrieb David Jones:

DMARC is a combination of SPF and DKIM plus From: header spoofing check.
You must get SPF and DKIM setup before adding the '_dmarc' DNS record for
the sending domain

tell me something new

This email was not just for you.  If you already knew this, then ignore it.

wait i tell you something (for you) new: DMARC and mailing-lists is a
awful topic - what do you think would have happened with you mail to the
list if your domain would enforce DMARC and my MX reject mails violating
the policy?

I knew that too but I am not going to go down to your level and make an
inappropriate comment like you did.

You are a smart guy so you would know to setup a different email address
to use with mailing lists that didn't have DMARC reject policy

sorry, but that makes no sense

* you did not provide a hint to the list-problem
* to "solve" the OP's problem DMARC is not needed

you can simply reject based on the from header anything pretending it's you own domain from foreign servers - no need for DKIM/DMARC/SPF - and on the MTA level but there are not only mailing-lists

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