On 17/05/17 16:02, Brian Candler wrote:
> I found the options "mx_fail_domains" and "srv_fail_domains" which treat
> failed SRV and MX record lookups as if they didn't exist.
http://exim.org/exim-html-current/doc/html/spec_html/ch-the_dnslookup_router.html#SECTprowitdnsloo
"when a DNS lookup in a dnslookup router results in a DNS failure
... in the case of an MX lookup ... matches mx_domains, in which case
routing fails".
... if that does what I think, your primay dnslookup router will
decline, and your 4g-specific dnslookup router can have a go.
--
Cheers,
Jeremy
