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Something strange...
We have implemented some filters avoiding the third-party-relay and
the spam, looking at the logs we find that sombody try to send a
message to a not allowed address and the Zmailer answered well but...
LOOK what happend then:
23665r MAIL From:<hotstuff@earthlink.net>
23665 -- policy result=0, msg: <NONE!>
23665w 250 2.1.0 Sender syntax Ok
23665r RCPT To:<fruittoot2@aol.com>
23665 -- policy result=-1, msg: <NONE!>
23665w 553 5.7.1 Policy rejection on the target address
23665r DATA
23665w 503 5.5.2 Waiting for RCPT command
******************************************* that's OK, but....
23665r To: hedgehog@yahoo.com
23665w 550 5.5.2 Unknown command 'To: hedgehog@yahoo.com'
*********************************************************
23665# -- pipeline input exists 464 bytes
23665r Date: Mon, 15 Jun 98 23:30:45 EST
23665w 550 5.5.2 Unknown command 'Date: Mon, 15 Jun 98 23:30:45 EST'
********************************************************************
23665# -- pipeline input exists 430 bytes
23665r From: hotstuff@earthlink.net
23665w 550 5.5.2 Unknown command 'From: hotstuff@earthlink.net'
****************************************************************
...
23665# -- pipeline input exists 2 bytes
23665r .
23665w 550 5.5.2 Unknown command '.'
23665r RSET
23665w 250 2.0.0 Ok
23665r QUIT
Don't you think that it would be better to reject the connection before?
Sombody could send a lot of lines keeping busy the server, lowing it
performance.
--
+------------------------------------------+
+ Ma. Carolina Leon Carri +
+ Red de Interconexion Universitaria - RIU +
+ e-mail: carolina@riu.edu.ar +
+ Tel: (541) 511-1201 +
+------------------------------------------+