You have got to reject the mail before it is delivered. You can analyze the content before delivery if use a milter sendmail plugin. I believe spamassassin will run as a milter plugin. It can analyze the message and then reject it before delivery.
It is better to reject before delivery, then the sender can re-attempt delivery. > --Luke > --Computer Science Sysadmin, MSU Bozeman > --admin(AT)cs.montana.edu 994-3931 > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] > On Behalf Of Michael Schwendt > Sent: Wednesday, January 22, 2003 9:38 AM > To: [EMAIL PROTECTED] > Subject: Re: Contacting an Open Relay server user by spammer > > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 22 Jan 2003 16:56:51 +0100, Peter Boy wrote: > > > > Efficiently, you can fight SPAM only where you have control over a > > > mail server and where you can reject messages or deny access. > > > > We have full control here (and ask ordb and osirus for open relay > > before accepting mail as a first defense). Do you know about good > > examples how to configure sendmail or postfix without engaging > > complete programs like spamassessin (just plain sendmail / m4 > > configuration options/rewriting rules)? > > No, I don't know of any such method beyond blacklisting IPs and > entire domains. IMHO, SPAM/UCE can only be detected by analyzing > subject line and message body (like SpamAssassin does it). > > It's just that once a server has accepted a message, the spammer is > happy, and it's too late to send out any mailer-daemon notification > because that one will never reach the spammer who uses faked or > non-existant e-mail addresses. > > - -- > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.0.7 (GNU/Linux) > > iD8DBQE+LskB0iMVcrivHFQRAlYeAJ96gSSCA34J5ZeccC7AzCsZe991XACfZtQy > Qip1TI4uaBMyC6IFGGtEV74= > =1MI9 > -----END PGP SIGNATURE----- > > > > -- > Psyche-list mailing list > [EMAIL PROTECTED] > https://listman.redhat.com/mailman/listinfo/psyche-list -- Psyche-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/psyche-list
