SM wrote: >At 11:49 14-11-2006, Philip Prindeville wrote: > > >>The problem with this is that the DNS returns the response (of the multiple >>PTR records) in no particular order, so looking up the rDNS can return >>one of three different names... >> >># nslookup >> >> >>>set type=any >>>server ns4.msft.net. >>> >>> >>Default server: ns4.msft.net. >>Address: 207.46.66.126#53 >> >> >>>212.115.107.131.in-addr.arpa >>> >>> >>Server: ns4.msft.net. >>Address: 207.46.66.126#53 >> >>212.115.107.131.in-addr.arpa name = mail1.microsoft.com. >>212.115.107.131.in-addr.arpa name = smtp.microsoft.com. >>212.115.107.131.in-addr.arpa name = maila.microsoft.com. >> >> >>So, if I put: >> >>whitelist_from_rcvd [EMAIL PROTECTED] mail1.microsoft.com >> >> > >Then use: > >whitelist_from_rcvd [EMAIL PROTECTED] microsoft.com > >Regards, >-sm > >
Yeah, in an earlier message, I considered that, but didn't want to leave myself "wide open" to every misbehaving host at Microsoft. So I take it the short answer is that you can't have three entries for the same mail address, and can't have multiple hostname args (which you really should be able to do... or maybe even take an IP address directly!). -Philip
