Re: [Exim] bydns_mx (again!) and mbx format questions

Góra strony
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Autor: D.M.Chapman
Data:  
Dla: exim-users
CC: D.M.Chapman
Temat: Re: [Exim] bydns_mx (again!) and mbx format questions
On Fri, Jul 25, 2003 at 02:53:20PM +0100, Philip Hazel wrote:
>
> If an item in a list of hosts for the manualroute router is of the
> form <domain>/MX then it represents the list of hosts defined by the
> MX records for that domain, in the order defined by the MX preference
> values. The use of this syntax implies "bydns" for this item, because
> MX records can be found only in the DNS.


Yep. That makes sense. I take it that:

ukc.ac.uk.        21h30m18s IN MX  5 pat.ukc.ac.uk.
ukc.ac.uk.        21h30m18s IN MX  5 greendale.ukc.ac.uk.
ukc.ac.uk.        21h30m18s IN MX  5 quicksilver.ukc.ac.uk.
ukc.ac.uk.        21h30m18s IN MX  7 mercury.ukc.ac.uk.


would map to:

pat.ukc.ac.uk:greendale.ukc.ac.uk:quicksilver.ukc.ac.uk:+:mercury.ukc.ac.uk

and not just:

pat.ukc.ac.uk:greendale.ukc.ac.uk:quicksilver.ukc.ac.uk:mercury.ukc.ac.uk

It's key that it load balances accross the equal priority hosts. If it maps
to the above then together with the randomize option will enable us to
emulate bydns completely AFAIUI.

> Come to think of it, a general feature "name/MX" meaning "the hosts to
> which this domain routes by MX" might have other applications.


Indeed.

> > A final option might be for us to patch the code ourselves to re-introduce
> > this option.
>
> Relax. I think I have just surrendered. :-)


Is the threat of my C coding that bad? :-)

> I'll take a look at the code and see what seems like a nice way to go on
> this one.


Thanks,

Darren