On Wed, May 22, 2013 at 12:59 PM, Michael Torrie <[email protected]> wrote: > Of everything I did, greylisting > seemed to have the most immediate effect and the most long-term effect. > Though crafting an SMTP server whitelist to prevent unnecessary delays > in legitimate mail took time.
Greylisting is very effective, but with any decent number of users (~500+) it becomes unacceptable. Sure you can maintain whitelists, but they will never be perfect and most users will not accept delays. Especially if it is business related. /* PLUG: http://plug.org, #utah on irc.freenode.net Unsubscribe: http://plug.org/mailman/options/plug Don't fear the penguin. */
