Here is another cool new feature in sendmail 8.13.0:
Add optional protection from open proxies and SMTP slammers which
send SMTP traffic without waiting for the SMTP greeting.
If enabled by the new ruleset greet_pause (see
FEATURE(`greet_pause')), sendmail will wait the specified
amount of time before sending the initial 220 SMTP
greeting. If any traffic is received before then, a 554
SMTP response is sent and all SMTP commands are rejected
during that connection.
According to people on the sendmail news group this is already blocking
60% of the spam and viruses before ANY bandwidth is waisted.
schu
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Received on Tue Jun 22 14:42:16 2004
This archive was generated by hypermail 2.1.8 : Tue Jun 22 2004 - 14:42:18 AKDT