[courier-users] Re: delivery of messages to dual stack MTAs

[Sam V. <mr...@co...>]

Matthias Wimmer writes:

> Hi Sam!
> 
> Sam Varshavchik schrieb am 2004-06-03 19:54:34:
>> The glitch is that if the primary mail relay has both IPv6 and IPv4 
>> addresses.  IPv4 addresses are queried first, via DNS, so they'll end up 
>> being tried first.
> 
> Is there a configuration option to change this order?

No.

>                                                       Why are AAAA
> records looked up first?

That's the way the logic works.

>                          All other applications I know (and the
> getattrinfo() function) first look up the AAAA records and afterwards
> the A records.

getattrinfo() function cannot lookup MX records.