[Mimedefang] suggestion - filter_begin

[Kevin A. McGrail]

> > 1) MX records are not required, when non-existant
> > the A record will be used.
>
> are you sure about that?
> i think you must have a MX record, what do you mean
> 'the A record', which A record? there could be lots of
> them.

He's correct.  If I have a zone:

imacompany.com    86400    IN    A    1.2.3.4

Then 1.2.3.4 is the defacto and only MX desctination for imacompany.com.

If I have a zone like this:

imacompany.com    86400    IN    A    1.2.3.4
imacompany.com    86400    IN    MX    5    1.2.3.5

mx1.imacompany.com    86400    IN    A    1.2.3.5

Then 1.2.3.5 is the only MX destination and the A record is not involved
because an MX record is defined.

> currect me if i'm wrong please.

Also, in regards to your solution, nothing says DNS is perfect.  You can and
will have DNS outages.  You should not go down this route.

I would recommendlooking at:
http://www.peregrinehw.com/downloads/sendmail/sendmail-8.12.X/untarred/contrib/slowqueue/ &
specifically
http://www.peregrinehw.com/downloads/sendmail/sendmail-8.12.X/untarred/contrib/slowqueue/slow-queue-notes

I think this will achieve your solution in a much better way.

Regards,
KAM