[exim] DANE ERROR: TLSA LOOKUP DEFER

Hello Exim users,

We recently received many of our end users complains that they are having problem sending email to *.gov.hk with this exim error:
DANE ERROR: TLSA LOOKUP DEFER
However we have contacted our government and their responds is:
“Our DNSSEC setup is fine, and it is not nesserary to have DANE setup together with DNSSEC , so it is the exim MTA problem. We have not actually setup DANE “
Now here comes the problem: how can we solve this problem passively? We have many cPanel server with Exim.

Thanks
Daniel