Signing as domain.com AND mailer.domain.com?

From: Steve Jenkins <steve_at_stevejenkins.com>
Date: Wed, 13 Oct 2010 14:32:38 -0700

Got a question about configuring so that I can send signed mail from the
same server, but as either sender_at_domain.com and sender_at_mailer.domain.com.

For corporate mail, we want to be able to just send signed mail as
sender_at_domain.com. That's working fine, and the return path on test mail is
sender_at_domain.com.

For newsletters, we want to send from sender_at_mailer.domain.com. We can
change the return path just fine, and the mail is getting signed by OpenDKIM
on the way out so my server-side config seems OK, but my email tests to
Brandon Checketts' site say that the "public key isn't available," which
means I'm messing up on the DNS records somehow. I'm not sure how to set up
the DNS TXT records for both the FQDN and just the DN.

And while we're on the subject, I realize this ISN'T an SPF list, but I also
don't know how to set up SPF for the mailer.domain.com situation, either.

Any help is appreciated!

Thanks,

Steve
Received on Wed Oct 13 2010 - 21:32:47 PST