Reverse DNS puzzle

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I am somewhat confused. Our domains have run fine with QDNS pro for a
couple years. We just switched providers. The ISP is hosting Secondary and
we're hosting primary. Since the switch I've been having trouble with
QuickDNS resolving queries intermittently, and occasionally outbound mail is
stuck in our mail queue with messages like "domain must resolve". What
get's me is that it's intermittent. Mail will go through after a few
attempts. Then immediatly sending to the same address fails in the same
way. I would have thought that mail having gone through once would indicate
that the correct domain info would be cached on both sides.

Anyway this is just the background. I decided to run DNS expert on some of
our domains. The only major issues it mentions is that there is
non-authoritative data received from the secondary server, but of more
concern is that it reports there are no PTR records for our machines with A
records. I don't get this. I had quickDNS pro create a reverse domain for
our whole IP range. Yet when I use an online Reverse DNS lookup it fails to
complete the reverse lookup, but is able to complete the reverse lookup on
some of the ISP's machines in the same IP range.

Can anyone see an anomaly with my server?

The mail domain is caravel.bc.ca with primary at ns1.caravel.bc.ca
The rest of the domains are virtual domains.

My reverse domain is 248.13.216.in-addr.arpa.

249.13.216.in-addr.arpa. NS ns1.caravel.bc.ca.
249.13.216.in-addr.arpa. NS ns2.cannect.com.
148.249.13.216.in-addr.arpa. PTR www.caravel.bc.ca.
149.249.13.216.in-addr.arpa. PTR proxy-ext.caravel.bc.ca.
152.249.13.216.in-addr.arpa. PTR www2.caravel.bc.ca.
154.249.13.216.in-addr.arpa. PTR ipsentry.caravel.bc.ca.
155.249.13.216.in-addr.arpa. PTR quotes.caravel.bc.ca.

If their there, why aren't they being served, or have I missed something.

Craig Bowers
Systems Manager
Caravel Management Corp.

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888/4-DPOINT

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858/452-3696