On Fri, Apr 27, 2012, at 05:32 PM, Jim Reid wrote: > This is beginning to smell very > much like something the DNS already provides for free.
If that auto-expiry hash table functionality is not already build into Postfix (which would be kind of nice to have for other things to; may look into it cobbling it up anyway), then that's a good point. At the moment, the only difference being the 'network traffic' to/from the DNS server. Likely not much of a burden. I could address it if need be by putting a caching DNS slave on the same box as the Postfix server. Overkill, it sounds like. -- Thanks, Karen