I think that the source of the problem here is
> ;; Truncated, retrying in TCP mode.
Dnsmasq is forwarding the query via UDP, and getting a reply, but it has
the bit set which says "the reply is too big for your UDP packet, try
again using TCP."
That gets returned to your requester, which
Subject: DNSMASQ failing to return SRV records with loss of communication to a
single DNS server
Issue: We have SIP SRV records for a domain which can be provided by two DNS
servers in our environment. During testing we have noticed that if one of the
DNS servers is un-reachable, the request
