> > Can these domains be identified uniquely with a DNS query? > Have a look > > at @mx_any and its friends, and then at the dnsdb lookup > type. Maybe > > you can use one of those in a precondition of a manualroute > router or > > in the route_list. > > They can only be identified by the lookup on the MX-record. > So, in theory, you could have a condition using dnsdb lookups - do all these domains have the same mx records or do they have different names that just resolve to that same IP address ? If it's the latter you might end up with nested dnsdb queries.... I suspect constructing such a query will be nontrivial - I'll leave it to people better qualified than myself.... John
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