On 2010-Jan-29 09:13, John Lange wrote:
A 29 minute grey list!? Are the people using this server really ok with a minimum 30 minute delay in getting their mail?
I had my personal mail server set to 2hrs in the very recent past, but with reasonably extensive whitelisting.
Given that mail zombie's usually only try once for each email address, I have mine set to 30 seconds.
Granted, the bots are getting more sophisticated and sometimes try more often but it's still effective.
Switched to postgrey, which had a default of 5 minutes, and noticed that such a short delay was permitting an awful lot of spam. Boosted it to 10 minutes, which cut things back down again (in combination with policyd-weighted, anyway).
Considering that e-mail was never meant to be near-real-time in the first place... it wasn't so long ago that sendmail's default operation mode was queued-only on a 30-minute (or longer!) interval from cron.
Heck, it wasn't even all that long ago that I got mail whenever I connected to my ISP and did an ETRN, twice a day.
So a 30-minute delay in receiving mail seems perfectly fine to me. Plus, I would MUCH RATHER people believe that e-mail does NOT reach me immediately; the expectation of immediate delivery - implying immediate action, immediate comprehension and immediate reply - has been shown in multiple studies to destroy worker productivity.
-Adam