[RndTbl] Shaw dropping on greylist?

Adam Thompson athompso at muug.mb.ca
Fri Jan 29 10:59:59 CST 2010

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.


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