Re: [Sqlgrey-users] Excessive X-Greylist headers

[Karl O. P. <ko...@me...>]

On Tue, 09 Jun 2015 09:51:53 -0400
Alex Regan <mys...@gm...> wrote:

> Hi Karl,
> 
> >> It seems when a message is sent to multiple recipients, multiple
> >> X-Greylist headers are added. When there are dozens of these, it
> >> appears some systems are rejecting it due to the header being too
> >> large.
> >>
> >> How can I configure it to only include one copy of the X-Greylist
> >> header?
> >>
> >> I'm using postfix. Is it possible to strip off all but one copy of
> >> the header?
> >> 
> >> X-Greylist: whitelisted by SQLgrey-1.8.0
> >
> > Is this inbound, outbound, or relayed mail?
> 
> This is from the headers on the destination system. It is received by 
> our mail relay, where the header is added, then sent to the
> destination system where the user reads the mail.

You shouldn't be relaying except from trusted systems,
so your smtpd_relay_restrictions should include
something like "permit_mynetworks", in addition
to your check_policy_service that runs sqlgrey.
Then relayed mail won't go through sqlgrey.
(Use smtpd_recipient_restrictions on older
versions of postfix.)

Whitelisting via sqlgrey is the wong approach.

But it looks to me like you've got something
else wrong since I wouldn't think, without
having really investigated, that any piece of
mail should go through sqlgrey more than once.
So you should only get one header no matter what.


Karl <ko...@me...>
Free Software:  "You don't pay back, you pay forward."
                 -- Robert A. Heinlein