On 23/10/2024 11:22, Leonardo Boselli via Exim-users wrote:
> for certain domains i have to give a "special treatment" so for example use only lowest MX, o using only IPv4 or IPv6 connections.
> Suggestions ?
This is presumably applying to sending *to* these domains from your
Exim system.
It matters which of
> only lowest MX, o using only IPv4 or IPv6
you actually need.
Assuming you still want MX lookups done, for the ipv4 case:
In your router chain have a "dnslookup" router placed before
the main one which is handling all the standard outbound.
Use an ipv4_only option.
For the other cases you mention, they are much more difficult.
You'd have to construct a string-expansion that does the
filtered DNS lookup you want, and use it in a "manualroute"
router.
Then there are the cases not covered by your examples.
[ If you merely wanted just to route to a single known IP,
it would be far more simple ]
This does seem like a rather obscure need.
Why not fix your DNS?
--
Cheers,
Jeremy
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