It seams to work properly when using ``` dns_try_naptr = on use_dns_failover = on dns_srv_lb = on use_dns_cache = on ``` `use_dns_failover` especially was off so a negative A entry was tried and failed. Will let it run for more time but seams top work.
It looks like the kamailio tries the non existing A record and than immediately stops on the broken record causing a de-register.
is there a reason why use_dns_failover is disabled by default?