Re: verify recipient - temp error instead of perm error

Dňa 13. augusta 2025 7:32:46 UTC používateľ Frank Richter via Exim-users <[email protected]> napísal:

>$ exim -d+all -v -bv [email protected]
>…
>08:51:29 2696420 local_part=test domain=gmial.com
>08:51:29 2696420 checking domains
>08:51:29 2696420 cached no match for +local_domains
>08:51:29 2696420 cached lookup data = NULL
>08:51:29 2696420 gmial.com in "!+local_domains "? yes (end of list)
>08:51:29 2696420 calling checkonly router
>08:51:29 2696420 checkonly router called for [email protected]
>08:51:29 2696420   domain = gmial.com
>08:51:29 2696420 gmial.com in "*"? yes (matched "*")
>08:51:30 2696420 DNS lookup of gmial.com (MX) gave TRY_AGAIN
>08:51:30 2696420 gmial.com in dns_again_means_nonexist? no (option unset)
>08:51:30 2696420 returning DNS_AGAIN
>08:51:30 2696420  writing neg-cache entry for gmial.com-MX-8000c3, ttl -1
>08:51:30 2696420 gmial.com in "*"? yes (matched "*")
>08:51:30 2696420 DNS_AGAIN treated as DNS_NODATA (domain in mx_fail_domains)
>08:51:30 2696420 DNS lookup of gmial.com (AAAA) gave TRY_AGAIN
>08:51:30 2696420 gmial.com in dns_again_means_nonexist? no (option unset)
>08:51:30 2696420 returning DNS_AGAIN
>08:51:30 2696420  writing neg-cache entry for gmial.com-AAAA-8000c3, ttl -1
>08:51:30 2696420 DNS lookup of gmial.com (A) gave TRY_AGAIN
>08:51:30 2696420 gmial.com in dns_again_means_nonexist? no (option unset)
>08:51:30 2696420 returning DNS_AGAIN
>08:51:30 2696420  writing neg-cache entry for gmial.com-A-8000c3, ttl -1
>08:51:30 2696420 checkonly router: defer for [email protected]
>08:51:30 2696420   message: host lookup did not complete
>[email protected] cannot be resolved at this time: host lookup did not complete
>
>Lookups for A and AAAA return also SERVFAIL.

Thanks, now i understand it -- fallback to A/AAAA... Perhaps
you can play with mx_domains too, IMO nowadays will be safe
to force MX records...

BTW, you asked how to change temporary error message, you
can use the same "trick" with warn as i posted and extend it
to catch temp DNS error -- exim has variable for it (sorry, i don't
remmember its name), but i never used it with verify. And then
use defer with own message, instead of deny...

regards


-- 
Slavko
https://www.slavino.sk/

-- 
## subscription configuration (requires account):
##   https://lists.exim.org/mailman3/postorius/lists/exim-users.lists.exim.org/
## unsubscribe (doesn't require an account):
##   [email protected]
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/