On 2017-02-15 16:30, Tom Hendrikx wrote:
Note that the period that you describe as 'seen by SA a bit later' is
typically less than a second.
On 16-02-17 06:22, Ian Zimmerman wrote:
Not in my case. I have a custom Exim configuration where I
intentionally wait for a period of time (currently 4 minutes) between
SMTP acceptance and delivery (SA runs at delivery time), precisely
because I want to give all the collaborative mechanisms the maximum
chance to kick in.
On 16.02.17 09:57, Tom Hendrikx wrote:
Why are you keeping mail in your queue, when you could also use
greylisting and achieve roughly the same delivery delay? Except that
lots of spambots don't understand greylisting and will never return for
the second delivery? And that you don't get a full queue when something
weird happens?
this can be used in addition to spambots.
Because of blacklists and other tricks (like greylist), the very common for
spammer is to use others mailservers.
processing delay can give some little advantage so that things like DCC
(if you report at erceive time, but check at processing time) can hit
between.
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