Am 21.10.2012 13:22, schrieb Mike's unattended mail: > The logical debate to this point have not favored proponents of the > two crude and sloppy techniques that I mentioned. But, I'm open for > good rationale; both for my benefit and the OPs.
what is so difficult to undestand? if you are lacking knowledge that a matching PTR and HELO should be one of the first things you have to care you are not qualified to maintain a mailserver these days if your IP is sending spam you will get blacklisted if you have a dial-up IP you do not care about quality nor have you any knowledge how e-mail these days is handeled - MOST spam ist from botnets and these are mostly infected clients on dial-up networks if i get 500.000 spam messages each day on a small server i have to filter them EFFECTIVE and not by content-scanning, the most effective way is * blacklists * filter dialup ranges * filter HELO hostnames * filter hosts with no PTR there may be some non-spam mails because ignorant and/or uuneducated admins maintaining a mailserver, but that is their problem because the 4 points above are EASY to fulfill face the truth and leave us in peace with your religion
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