Probably not related to any general reduction in spam, but one very
distressed Imail system admin asked me to install IMGate last
September. The first day, IMGate did 3+ million rejects, and his IMail
system immediately began working reliably and quickly again.
Yesterday, the same MX had these numbers:
1 ETRN Mail theft attempt
2 DNS no A/MX for @recipient.domain
8 ACL provider PTR and ccTLD HELO
10 ACL provider PTR and ccTLD sender domain
22 SMTP Exceeded Hard Error Limit after END-OF-MESSAGE
33 ACL SAV: new verification in progress
34 ACL to_local_recipients unknown recipient
37 SMTP Invalid HELO hostname
44 SMTP Exceeded Hard Error Limit after RSET
49 ACL helo_hostnames
62 DNS timeout for MTA PTR hostname (forged @sender.domain)
67 SMTP Exceeded Hard Error Limit after CONNECT
83 ACL from_senders_bw
101 SMTP Exceeded Hard Error Limit after MAIL
114 RBL dnsbl.njabl.org
131 RBL blackhole.securitysage.com
186 ACL unk PTR and ccTLD
269 ACL MAIL FROM: bigISP forged
278 DNS nxdomain for MTA PTR hostname (forged @sender.domain)
285 SMTP unauthorized pipelining
338 SMTP unqualified HELO hostname
382 ACL SAV: undeliverable sender address
454 ACL from_senders_imgfx
634 RBL list.dsbl.org
785 ACL MAIL FROM: ccTLD from unknown PTR
992 ACL mta_clients_rbl
1066 ACL SAV: unverifiable sender address
1236 ACL No PTR for big ISP HELO hostname
1293 RBL bl.spamcop.net
1681 ACL mailpolice @sender.domain
3048 ACL unauthorized relay
3692 RBL block.rhs.mailpolice.com
5836 DNS no A/MX for @sender.domain
5848 RBL sbl.spamhaus.org
6162 RBL cbl.abuseat.org
6868 SMTP invalid [EMAIL PROTECTED]
7056 SMTP HELO hostname is IP
8201 ACL greylist initial reject
13915 ACL too many SHEL rejects
28938 ACL mta_clients_bw
31902 SMTP Exceeded Hard Error Limit after DATA
46967 ACL mta_clients_dict
137930 SMTP Exceeded Hard Error Limit after RCPT
371347 ACL to_relay_recipients unknown recipient
========================
688387 TOTAL
Which is about a 75% reduction in rejects.
Len
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