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From "Noel J. Bergman" <n...@devtech.com>
Subject RE: Regarding BUG 24885: RemoteDelivery only tries one of multiple A record
Date Fri, 05 Dec 2003 15:30:38 GMT
Søren Hilmer wrote:
> Noel J. Bergman wrote:
> > In my view, it should be done by our DNS lookup code.  See RFC 2821,
> > section 5:
> >
> >   The destination host (perhaps taken from the preferred MX record) may
> >   be multihomed, in which case the domain name resolver will return a
> >   list of alternative IP addresses.  It is the responsibility of the
> >   domain name resolver interface to have ordered this list by
> >   decreasing preference if necessary, and SMTP MUST try them in the
> >   order presented.
> >
> > So it is handling a multihomed destination that needs to be addressed.

> the problem of handling it at the DNS lookup level (which I
> agree is the conceptually right thing to do) is that the
> logging from RemoteDelivery gets more cryptic as the link
> to the MX record is lost

The return is a Collection of String objects.  Each one is currently of the
form "host", but if we were to handle multi-homed hosts by using "host/IP",
it seems to me that we could either parse it directly, or change the way we
construct the URLName.


	--- Noel

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