On Tue, 24 Jul 2007 06:01:07 -0500, Jacob Yocom-Piatt wrote: >for domains that have multiple MX records, it might be nice to have all >those IPs whitelisted when sending to that domain. maybe this is already >done or there is a reason it isn't :). guess someone could publish a >list of bogus IPs in their MX records... >
Outgoing server pools do not have MX records ......... Some biggies use SPF (Bob Beck has good info in a presentation about why you would not use it at your own MX to check incoming mail) and those usually provide records that you can access with dig or host. Use -ttxt and see. e.g. _spf.google.com has a /16, a /17, a/ 18, two /19s and a /20 which you can add by hand to your own whitelist if you trust all gmail clients. Rod/ >From the land "down under": Australia. Do we look <umop apisdn> from up over?
