Date: Tue, 6 Jun 2000 15:14:19 -0500 (CDT) From: "James A. Mutter" <jmutter@colltech.com> To: Gabriel Ambuehl <gabriel_ambuehl@buz.ch> Cc: keith@mail.telestream.com, questions@FreeBSD.ORG Subject: Re: Spoofed mail Message-ID: <Pine.GSO.4.21.0006061513200.10776-100000@psasolar.private.psa.pencom.com> In-Reply-To: <90470422972.20000606215646@buz.ch>
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> Tuesday, June 06, 2000, 9:50:49 PM, you wrote: > > Is there a method to prevent mail spoofs? What is to stop spamers from > > just scripting a telnet to port 25 and doing their deeds there? > > Configuring your SMTP to only allow users with the right to send > mail... The way to accomplish that depends on the mailserver you use. > Don't ask me anything about sendmail, qmail is ok though ;-) POP Before SMTP is a good way to do this. Force the users to comlete a valid POP transaction before accepting mail from that host. Sendmail, Postfix, and I'm guessing QMail all support this, with varying degrees of difficulty. -- Jim To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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