In article <4178e3f3-de16-8d62-4810-8785dc095...@spamtrap.tnetconsulting.net>, Grant Taylor via mailop <gtay...@tnetconsulting.net> wrote: >-=-=-=-=-=- >-=-=-=-=-=- > >On 12/18/20 10:22 AM, John Levine via mailop wrote: >> I tried that for a while. I found that some senders took quite a >> while to give up on the nolist host and go to the backup so it caused >> noticable mail delays. > >How much delay were you seeing?
It was a while ago, but I think hours. >How did that delay compare to grey listing? Particularly compared to >stateful grey listing and / or sending farms with rotating sending IPs. There's a lot of ways to do greylisting, most of which are overkill. Mine accepts a retry from any address in the same /24 as the original, and whitelists the IP indefinitely after a successful retry. So there is some delay the first time someone sends a message but not after that. As I recall some sites were getting stuck on the nolist host for every message. R's, John -- Regards, John Levine, jo...@taugh.com, Primary Perpetrator of "The Internet for Dummies", Please consider the environment before reading this e-mail. https://jl.ly _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
