On 20/03/2022 19:35, Christian Eyrich via Exim-users wrote:
my exim installation is failing when I try forcing DNSSEC for DANE using 
"dnssec_require_domains" for any domain.

--------> dnslookup_secure router <--------
local_part=dnssectest1 domain=mailbox.org
checking domains
R: dnslookup_secure for [email protected]
calling dnslookup_secure router
dnslookup_secure router called for [email protected]
   domain = mailbox.org
DNS lookup of mailbox.org (MX) succeeded
dnslookup_secure router: defer for [email protected]
   message: host lookup done insecurely
added retry item for R:[email protected]: errno=-1 more_errno=0 flags=0
LOG: MAIN
   == [email protected] R=dnslookup_secure defer (-1): host lookup done 
insecurely

The lookup was attempted, and DNSSEC verification of the result failed.
Either the target DNS record provider (or the chain back up to the DNS root)
do not support DNSSEC, or some bad actor is interfering with the lookup.
--
Cheers,
  Jeremy

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