On Wed, 27 Apr 2005 15:14:20 -0400, Jason Gurtz wrote > If you do strict reverse checking you'll definitely throw out valid mail. > You'll just have to see if that's OK or how much BOFH you can get > away with.
Niel's hack only tempfails in the scenario where there is a PTR but it does not match.... This gives our admin staff alot of time to decide to whitelist or to take other actions, so far we have whitelisted one local ISP from rDNS checks and one local business that is working on correcting their issues (more numerous than just rDNS). Honestly, in your case I would use CNAMES liberally and make your MX server the same as the PTR reverses but have customers still use the CNAME for their MUA configurations. This will not appear any different to the end user but will bring you into full compliance without using a CNAME for the MX record (which is a rfc MUST NOT). Jim -- EsisNet.com Webmail Client _______________________________________________ Visit http://www.mimedefang.org and http://www.canit.ca MIMEDefang mailing list MIMEDefang@lists.roaringpenguin.com http://lists.roaringpenguin.com/mailman/listinfo/mimedefang