I'm running Exim version 4.67 on a Linux (Gentoo) box.
My users are in a Mysql Database.
I'm happily running the "built-in" greylisting based on SQL - ie...
Greylisting Definitions are:
# are they in the database already ?
GREYLIST_TEST = SELECT CASE \
WHEN now() - block_expires > 0 THEN 2 \
ELSE 1 \
END \
FROM greylist \
WHERE relay_ip = '${quote_mysql:$sender_host_address}' \
AND sender = '${quote_mysql:$sender_address}' \
AND recipient = '${quote_mysql:$local_p...@$domain}'
# add them in, with 10 minute block
GREYLIST_ADD = INSERT INTO greylist (relay_ip, sender, recipient,
block_expires) \
VALUES ( '${quote_mysql:$sender_host_address}', \
'${quote_mysql:$sender_address}', \
'${quote_mysql:$local_p...@$domain}', \
DATE_ADD(now(), INTERVAL 10 MINUTE) \
)
# keep the entry fresh.
GREYLIST_UPDATE = UPDATE greylist SET \
block_expires = DATE_SUB(now(), INTERVAL 5 MINUTE) \
WHERE relay_ip = '${quote_mysql:$sender_host_address}' \
AND sender = '${quote_mysql:$sender_address}' \
AND recipient = '${quote_mysql:$local_p...@$domain}'
-----------
And:
# set a variable marking whether they were in the database
warn set acl_m2 = ${lookup mysql{GREYLIST_TEST}{$value}{0}}
# new entry in database - defer, and add them
# Disable Greylisting
# warn message = Greylisted - please try again a little later.
# Enable Greylisting
defer message = Greylisted - please try again in 15 minutes.
condition = ${if eq{$acl_m2}{0}{1}}
condition = ${lookup mysql{GREYLIST_ADD}{yes}{no}}
# they are listed, but it is still too early
# Disable Greylisting
# warn message = Greylisted - please try again shortly.
# Enable Greylisting
defer message = Still Greylisted - please wait a full 15 minutes
before retrying.
condition = ${if eq{$acl_m2}{1}{1}}
# freshen entry
warn condition = ${lookup mysql{GREYLIST_UPDATE}{yes}{no}}
---------------
I have requests from some user to *not* do Greylisting. I've added a
field 'dogrey' which can have a 'Y' or 'N' value which is under user
control. The idea is if the user wants Greylisting switched off - they
change this from the Default of 'Y' to 'N'.
What I'd ideally like is to still populate the greylisting table
regardless of the users settings - but also honour the users wish if
they don't want their e-mail delayed by greylisting.
I'm looking for "Net Wisdom" as to the best way to do this.
--
. . ___. .__ Posix Systems - Sth Africa
/| /| / /__ [email protected] - Mark J Elkins, SCO ACE, Cisco CCIE
/ |/ |ARK \_/ /__ LKINS Tel: +27 12 807 0590 Cell: +27 82 601 0496
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