Re: [exim] secondary MX: allow only a set of users

On Thu, Dec 20, 2007 at 09:50:01AM +0100, Leonardo Boselli wrote:
> Il 19 Dec 2007 alle 22:11 Daniel Collis-Puro immise in rete
> > Leonardo Boselli wrote:
> > > I want: avoid that the secondary mx accept email that in turn is
> > > sent to the primary and then bounced. So i would like to set a list
> > > of possible address that are accepted. such list however is not just
> > > a plain list of addresses, but it could be also a list with some
> > > addresses written as: abc-g* to say that it must accept any address
> > > whose five characters are abc-g what is the easier and quicher way
> > > to accomplish this, other than adding many director sections in
> > > exim4.conf ???
> > Why not use a recipient verification callout for the destination mail
> > server? Something like:
>
> NOT feasible:

Sure it is.

> the secondary mx is usually used when the primary is of, or overloaded
> and do not accept more connections or give immediately a 421 error.

Look for 'smtp_reserve_hosts'. With this, you can allow the backup MX to
connect to the master even when the master is already 4xx'ing other
hosts because of things like smtp_load_reserve.

> Also for other reason caching, unless on a file that can be
> easily moved between the MX 13 and MX 20, is not usable. --

Care to give a bit more info on that?

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