>> The power of ASSP is, that there is nothing to send back. ASSP answers >> and reject on the spot. So if you use the flatfile or LDAP for user >> validation, there is nothing to store at the mail server. ASSP can >> also use the 550 answer from the mail server to reject the mail. No NDN >> necessary. > and that means no backscatter. > it's plain wrong to accept a mail and then send an answer back to a > (forged) sender.
Agreed, for IN-coming mail. However, Nicole and I were talking about OUT-going mail. The sender isn't forged, he's just an idiot who can't type an (outgoing) address correctly. Internal LAN User MUA --> MTA1 --> ASSP --> MTA2 (Relay) --> Internet Or even with no ASSP involved: - Internal LAN User MUA --> MTA1 --> MTA2 (Relay) --> Internet MTA1 is the standard internal Mail Server that the users interact with - Exchange or whatever. Users send outgoing messages to MTA1. MTA1 delivers all mail to MTA2 (perhaps via ASSP for white listing purposes) and doesn't need to worry about it anymore. MTA2 tries to deliver a message and discovers that it's undeliverable (perhaps after 240 tries, or whatever your setting is). MTA2 thus needs to notify the internal LAN user of a NDR. This isn't an ASSP function at all, but since ASSP often requires the use of a relay MTA for outgoing mail, it's relevant on this list, I believe. Kind regards, William Stucke ZAnet Internet Services (Pty) Ltd [EMAIL PROTECTED] 083-308-0700 - WFS 074-333-0109 - Office 086-502-9444 - Fax http://www.zanet.co.za -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Marrco Sent: 13 February 2007 04:09 PM To: Questions and Answers for users of ASSP Anti-Spam SMTP Proxy Subject: Re: [Assp-user] ASSP and sendmail > The power of ASSP is, that there is nothing to send back. ASSP answers > and reject on the spot. So if you use the flatfile or LDAP for user > validation, there is nothing to store at the mailserver. ASSP can > also use the 550 answer from the mailserver to reject the mail. No NDN > necessary. and that means no backscatter. it's plaing wrong to accept a mail and then send an answer back to a (forged) sender. ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Assp-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/assp-user ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier. Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Assp-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/assp-user
