> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of RW > Sent: Wednesday, June 27, 2007 5:51 PM > To: firstname.lastname@example.org > Subject: Re: Gradual move to own mail server - strategy for noob > > > On Wed, 27 Jun 2007 10:27:56 +0100 > Barnaby Scott <[EMAIL PROTECTED]> wrote: > > Ultimately, but not yet, I want to start using the FreeBSD machine as > > a proper mailserver - i.e. get a static IP address and point the MX > > record hosted by my provider at it. > > It may not be sufficient to get a static IP address. If you wish to > send out mail directly, you really need one with control of reverse > DNS, since that's the criterion for getting out of dynamic > address blocklists.
No, not exactly, this is a simplification. Some don't pay attention to PTR's. The correct way is to resolve the hostname passed in the HELO and compare the IP that results to the senders IP. Some lists do that some don't when looking at removal requests. You really need a /24 subnet to be free of this. A number of the blacklists these days are making the very ignorant assumption that if a single IP in a /24 is spamming, that it is OK to block the entire /24. The idea is if we disrupt traffic enough the ISP will magically step in and do something about it. I don't know exactly why these blacklist owners seem to have settled on a /24, they probably got C's in their classes in school so have an especial affinity for the deprecated-years-ago term "class C IP subnet" Any ISP these days handing out static IP's has a mechanism for putting in a PTR record. Ted _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"