Hi again, Sendmail is relaying mail because it thinks it's coming from its own IP. This happens when the proxy is in between.
Here are 3 telnet SMTP-sessions. The 2nd one is able to do an open relay. They are all talking to the same sendmail. Sendmail listens on: 82.150.128.198:225 ASSP listens on: 82.150.128.198:25 Foreign domain connecting to SENDMAIL [EMAIL PROTECTED] mail]# telnet 82.150.128.198 225 Trying 82.150.128.198... Connected to 82.150.128.198. Escape character is '^]'. 220 smtp.dsdeurne.nl ESMTP Sendmail 8.13.8/8.13.8; Mon, 25 Feb 2008 14:47:25 +0100 helo hetemail.com 250 smtp.dsdeurne.nl Hello cust-03-55bf00f1.adsl.scarlet.nl [85.191.0.241], pleased to meet you mail from: <[EMAIL PROTECTED]> 250 2.1.0 <[EMAIL PROTECTED]>... Sender ok rcpt to: <[EMAIL PROTECTED]> 550 5.7.1 <[EMAIL PROTECTED]>... Relaying denied quit 221 2.0.0 smtp.dsdeurne.nl closing connection Connection closed by foreign host. Foreign domain connecting to ASSP OPEN RELAY!!!!!!! [EMAIL PROTECTED] mail]# telnet 82.150.128.198 25 Trying 82.150.128.198... Connected to 82.150.128.198. Escape character is '^]'. helo hetemail.com mail from: <[EMAIL PROTECTED]> rcpt to: <[EMAIL PROTECTED]> 220 smtp.dsdeurne.nl ESMTP Sendmail 8.13.8/8.13.8; Mon, 25 Feb 2008 14:48:30 +0100 250 smtp.dsdeurne.nl Hello smtp.dsdeurne.nl [82.150.128.198], pleased to meet you 250 2.1.0 <[EMAIL PROTECTED]>... Sender ok 250 2.1.5 <[EMAIL PROTECTED]>... Recipient ok Foreign domain connecting to ASSP [EMAIL PROTECTED] mail]# telnet 82.150.128.198 25 Trying 82.150.128.198... Connected to 82.150.128.198. Escape character is '^]'. 220 smtp.dsdeurne.nl ESMTP Sendmail 8.13.8/8.13.8; Mon, 25 Feb 2008 15:13:08 +0100 helo hetemail.com 250 smtp.dsdeurne.nl Hello smtp.dsdeurne.nl [82.150.128.198], pleased to meet you mail from: <[EMAIL PROTECTED]> 250 2.1.0 <[EMAIL PROTECTED]>... Sender ok rcpt to: <[EMAIL PROTECTED]> 530 Relaying not allowed ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Assp-test mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/assp-test
