Hi,
I'm trying to use ratelimiting to block connections from hosts who try
send
email to invalid recipients. I was hoping to achieve this as follows:
# This block should increment the sources sending rate if the conditions are
# met, i.e. the destination mailbox doesn't exist
warn ratelimit = 2 / 10m / strict
!hosts = : +relay_from_hosts
condition = ${if le{$sender_rate}{$sender_rate_limit}}
logwrite = RATE UPDATE: $sender_rate/$sender_rate_period (max
$sender_rate_limit)
condition =
${lookup{$local_p...@$domain}dbm{confdir/validEmailAddresses.dbm} {no} {yes} }
# This block will deny any mails to mailboxes which dont exist
deny
log_message = Recipient Verification Failed:
message = local error
# delay = 30s
domains = msre.ie : msre.com.sg
condition =
${lookup{$local_p...@$domain}dbm{confdir/validEmailAddresses.dbm} {no} {yes} }
# if the recipient is valid we should reach here and should deny the email if
# the sending rate as set above (to invalid addresses) is too high. The
# actual rate should not be updated (due to the noupdate option !!
deny ratelimit = 2 / 10m / strict / noupdate
!hosts = : +relay_from_hosts
log_message = RATE: $sender_rate/$sender_rate_period (max
$sender_rate_limit)
The problem is that the noupdate option does not seem to make any difference
and the rates as dumped from exim_dump are being updated by the final stanza.
Is this a bug in the Debian Lenny packaging or (more likely) am I doing
something incorrect....
Thanks for your assistance,
Ruairi
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