Hello guys,
We've been using IMGate for a year now, and it seems that it's becoming out
of date.
Well, when I first setup IMGate, it filtered out nearly 95% of overall spam.
(Maybe 1 or none spam in a day.) But after a year, I receive nearly ~12
spams a day. God knows how many I'm going to receive if I plug IMGate off.
This could mean 2 things, first, spammers got smarter and they can easily
override this machine now OR the amount of spam increased SO much over a
year that IMGate still filtering 95% of the spam but in the big picture it
doesn't do any good since we're all receiving more than 10 spams a day.
IMHO Public wireless networks are the main reason for this rapid increase.
Hmm, any ideas ?
Thanks.
PS: Here is a part of spamstats for this month.
1 ETRN Mail theft attempt
3 SMTP Exceeded Hard Error Limit after DATA
5 ACL from_senders_clueless
16 SMTP unauthorized pipelining
20 SMTP Exceeded Hard Error Limit after CONNECT
42 SMTP invalid [EMAIL PROTECTED]
73 ACL header checks
134 RBL cn.countries.nerd.dk
191 RBL korea.services.net
315 ACL unauthorized relay
416 SMTP Exceeded Hard Error Limit after RCPT
489 ACL helo_hostnames
597 SMTP invalid [EMAIL PROTECTED]
627 DNS no A/MX for @sender.domain
898 DNS no A/MX for @recipient.domain
1084 DNS timeout for MTA PTR hostname (forged @sender.domain)
1767 DNS nxdomain for MTA PTR hostname (forged @sender.domain)
1913 RBL sbl.spamhaus.org
1924 ACL body checks
5696 RBL bl.spamcop.net
