gpeel at thenetnow
Aug 26, 2008, 2:17 PM
Post #1 of 5
(231 views)
Permalink
|
|
Greylist -Hosts sending from Multiple MX's.
|
|
Hi all,
A few months back, with alot of help from this list, I implimented
GREYLISTING (which is working well), with one exception:
Some ISPs (mail hosting farms, Spam scanning services etc, sometimes resend
from a different MX each retry period, which, obviously, causes some serious
email delays - todays for example, was delayed about 8 hours.
Question: Is there an expression we can add that will only look at the FQDN
or change the FQDN (as opposed to the full MX name?
i.e. mx129.emailservice.com to emailservice.com (or *emailservice.com)
Thanks in advance,
-Grant
Here is the GREYLISTING setup (from 'configure'):
...
GREYLIST_TEST = SELECT IF(NOW() > block_expires, 2, 1) \
FROM exim_greylist \
WHERE relay_ip = '${quote_mysql:$sender_host_address}' \
AND from_domain = '${quote_mysql:$sender_address_domain}' \
AND record_expires > NOW()
GREYLIST_ADD = INSERT INTO exim_greylist \
SET relay_ip = '${quote_mysql:$sender_host_address}', \
from_domain = '${quote_mysql:$sender_address_domain}', \
block_expires = DATE_ADD(NOW(), INTERVAL 1 MINUTE), \
record_expires = DATE_ADD(NOW(), INTERVAL 14 DAY), \
origin_type = 'AUTO', \
create_time = NOW()
GREYLIST_UPDATE = UPDATE exim_greylist \
SET record_expires = DATE_ADD(now(), INTERVAL 14 DAY) \
WHERE relay_ip = '${quote_mysql:$sender_host_address}' \
AND from_domain = '${quote_mysql:$sender_address_domain}' \
AND record_expires > NOW()
...
warn set acl_m2 = ${lookup mysql{GREYLIST_TEST}{$value}{0}}
defer ! hosts = +whitelist
! hosts = +relay_from_hosts
! authenticated = *
condition = ${if eq{$acl_m2}{0}{yes}}
condition = ${lookup mysql{GREYLIST_ADD}{yes}{no}}
message = Now greylisted - please try again in 1
minute.
log_message = ADDING TO GREYLIST
defer ! hosts = +whitelist
! hosts = +relay_from_hosts
! authenticated = *
condition = ${if eq{$acl_m2}{1}{yes}}
message = Still greylisted - please try again in 1
minute.
log_message = STILL GREYLISTED
defer
! hosts = +whitelist
! hosts = +relay_from_hosts
! authenticated = *
condition = ${lookup mysql{GREYLIST_UPDATE}{no}{no}}
message = Greylist update failed
log_message = GREYLIST UPDATE FAILED
...
--
## List details at http://lists.exim.org/mailman/listinfo/exim-users
## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://wiki.exim.org/
|
signature.asc
