It certainly is an option, and it would certainly work. But
personally, I reserve use of the words "best practice" for things that
have been shown to work better than all other options. I don't know
that that's been measured yet.
Good point... I figured someone would say it :-)
The real problem is that we're all guessing. If everyone followed the
rules for DKIM and ADSP, it wouldn't matter what domains you used,
since the specs make it quite clear that as far as DKIM is concerned,
there's no relation between one domain and another, even if one is a
subdomain of another. So we have to try to guess in what ways people
will implement DKIM wrong and at the point, we don't have enough data
to say one way or another.
Personally, I think you should use x.com because it's such a cool domain,
or failing that, corp.paypal.com.
R's,
John
_______________________________________________
dkim-ops mailing list
dkim-ops(_at_)mipassoc(_dot_)org
http://mipassoc.org/mailman/listinfo/dkim-ops