Hallo,
Unfortunately, I have quite a few customers who want to receive email
from their own domain at a different email address, such as a Gmail or
Hotmail address. I forward this in /etc/postfix/virtual.
But I actually don't understand why this arrives, especially if the
sender has an SPF or DMARC clearly states that it should be rejected if
the email comes from the wrong IP.
Perhaps Gmail and others don't care about that, but it could also be
that they look beyond the forward address and see that it comes from a
legitimate IP, but only forwarded is.
That would be good, but maybe easily forged without DKIM?
Could someone tell us more about this?
And what is a good solution for forwarding? Rewrite the sender? SRS?
With regards,
Paul van der Vlis
--
Paul van der Vlis Linux systeembeheer Groningen
https://vandervlis.nl/
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