I am not sure you understand how an SMTP conversaation takes place... it is my understanding that the client cannot "ignore" a 5xx response and continue blasting data... since the server will not talk to a client after sending a 5xx response and closes the connection. Thus after recieving a 5xx return code a client would have to start over, generating another 5xx... etc.
Client can ignore 5xx response from Sendmail. For example, if you have "1.2.3.4 REJECT" in access file, and client ignores 5xx, conversation would look something like:
220 foobar.com ESMTP Unauthorized access prohibited ehlo barfoo.com 250-foobar.com Hello barfoo.com [1.2.3.4], pleased to meet you 250 ENHANCEDSTATUSCODES MAIL FROM:<[EMAIL PROTECTED]> 550 5.7.1 Access denied RCPT TO:<[EMAIL PROTECTED]> 550 5.7.1 Access denied DATA 550 5.7.1 Access denied From: [EMAIL PROTECTED] 550 5.7.1 Access denied To: [EMAIL PROTECTED] 550 5.7.1 Access denied Subject: buy something 550 5.7.1 Access denied
and so on, until spammer disconnects... Try it out. Sendmail will close network socket only when other side disconnects, sends QUIT, or in case of timeout.
This is because we have only "error" built-in mailer in Sendmail. If we had "disconnect" built-in mailer, things would probably be a bit different.
-- Aleksandar Milivojevic <[EMAIL PROTECTED]> Pollard Banknote Limited Systems Administrator 1499 Buffalo Place Tel: (204) 474-2323 ext 276 Winnipeg, MB R3T 1L7 _______________________________________________ Visit http://www.mimedefang.org and http://www.canit.ca MIMEDefang mailing list [EMAIL PROTECTED] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
