On Thu, 16 Sep 1999 22:54:06 -0700 John Lawless wrote:
Hello John,
> As I understand it now, MX, if available, is always superior to A for
> mail routing. This seem to make 'bydns' the best option, with bydns_mx a
> reasonable second choice. Why would anyone ever choose bydns_a?
> Just curious.
For instance for the following config.
Main domain is switch.ch, with an MX as well as a wildcard MX pointing
to my main MTA chx400.switch.ch.
There are several subdomains that are treated specially. One of them
is handling dial-up clients. Although MX for that subdomain is pointing
to chx400.switch.ch, I want to route mail to that host using bydns_a.
This would not be possible using bydns for the obvious loops.
Regards,
Bernard Stern, SWITCH
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