>What are the options for setting up reverse DNS (PTR records) for
>virtual domains, all on a single IP?
put at many PTR records as you want for an ip, but assume only the
first is going to be used by resolvers.
>As I understand it, we can only have one PTR record per IP. In that
>case, how will the other domains be verified by anti-spam filtering
>which makes use of PTR
>records?
first thing is to have the reverse delegation done for the ip, then
have a PTR record, and usually the best practice is to put the
default, non-virtual Imail hostname as the PTR hostame.
Len
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