For 10 years now I've been running a Linux (CentOS 7) server, using
Postfix to handle mail for a handful of users.
Specifically, I'm running Postfix 2.2, because that is the most recent
version yum will fetch
from the current/default set of repositories.
Some users want to use GMail, so I have used an alias (in an aliases file)
to forward their mail to their GMail account, making
person at my.domain
an alias for
same_person at gmail.com
Recently, users have told me they have discovered that mail has not reached
them because it was rejected by GMail.
The rejection mail I have seen says GMail rejected the message because the
IP address of my server did not pass
DKIM or SPF for the source of the email.
I have set up SPF for my domain, but I don't think that is relevant to
FORWARDING mail (is it?).
So I'm not sure what to do next.
Do I have to set up DKIM?
Can I do that with Postfix 2.2?
Robert.
--
Robert Inder, 0131 229 1052 / 07808 492
213
Interactive Information Ltd, 3, Lauriston Gardens, Edinburgh EH3 9HH
Registered in Scotland, Company no. SC 150689
Interactions speak louder than
words
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