[Greylist-users] Adelphia vs greylisting
maillist at devilsplayground.net
Sun Sep 25 14:20:20 PDT 2005
Barb Dijker wrote:
> We had a problem with a cable company that would not retry soon after
> the block (5 minutes), but would retry once at 24 hours and then
> never again. I don't recall what company it was. So we tried
> opening up our retry time to 25 hours. It didn't appreciably
> increase spam, so that's where we left it. I hate one-off whitelisting.
> The spec doesn't say how soon one must retry. In some logic, for
> some sites, waiting a day may make sense.
Personally, I'm currently greylisting for 5 minutes, then whitelisting for 28 days from the last time the triplet was attempted (whether or not it was successful)
I haven't seen much spam slipping in during the 24-hour and 28 day window that didn't also try a redeliverying between 5-minutes and 24-hours.
If the zombie world changes I'll update my configuration appropriately, but this seems to reduce the negative impacting of greylisting rather significantly.
I do tend to play with my greylisting period a lot, anywhere from 5 minutes to 60 seems to be around the same effectiveness, so I keep it short to avoid annoying users.
I guess we'll be going down together, I mean getting off together,
I mean ... That's Ok, I'll just press the button for the stimulator.
-- Homer Simpson
More information about the Greylist-users