> On Nov 15, 2018, at 9:34 PM, pg...@dev-mail.net wrote:
>
> Is it efficient (enough) to check the DNSBLs I've got configured for
> postscreen?
Yes.
> That email is
>
> from=<m...@mydomain.com>
> to=<m...@mydomain.com>
>
> I do have DMARC policy, DKIM & SPF record configured for my domain.
>
> Are any of those, or the 'me-to-me' attempt, "cheaper"?
No. Because postscreen(8) does (typically all) its work on TCP connect, before
any
SMTP dialogue takes place. To the see the from/to addresses you'd have to talk
to
an actual smtpd(8) to handle the mail transaction, which is what postscreen(8)
is there
to avoid.
> If so, is it possible to promote their use in Postscreen?
No.
> Or is postscreen already at low(est) overhead, and best to leave it as is?
Leave it be.
--
Viktor.
