On 3/22/21 11:28 PM, Phil Stracchino wrote: > On 3/20/21 10:33 PM, li...@lazygranch.com wrote: >> This stops many a spammer. I forget who posted the info on the fqrdns >> but that is very effective as well. > > > So I switched a couple of days ago now to using this instead of > reject_unknown_helo_hostname. So far it seems to be working well.
With a few days more observation, it turns out that not only does the fqrdns list not block any of my current incoming spam, but it DID block at least one major source of legitimate incoming mail. So it did more harm than good. I question whether blocking dynamic IP ranges is actually a valid and useful antispam measure any more. -- Phil Stracchino Babylon Communications ph...@caerllewys.net p...@co.ordinate.org Landline: +1.603.293.8485 Mobile: +1.603.998.6958
