From owner-freebsd-questions Thu Oct 31 3:10:43 2002 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1672B37B404 for ; Thu, 31 Oct 2002 03:10:42 -0800 (PST) Received: from grummit.biaix.org (213-97-212-86.uc.nombres.ttd.es [213.97.212.86]) by mx1.FreeBSD.org (Postfix) with SMTP id E9D4743E75 for ; Thu, 31 Oct 2002 03:10:39 -0800 (PST) (envelope-from joan@grummit.biaix.org) Received: (qmail 1785 invoked by uid 1000); 31 Oct 2002 11:09:42 -0000 Date: Thu, 31 Oct 2002 12:09:42 +0100 From: Joan Picanyol To: freebsd-questions@FreeBSD.ORG Subject: Re: Sendmail: non-relay & secure Message-ID: <20021031110942.GA1485@grummit.biaix.org> Mail-Followup-To: freebsd-questions@FreeBSD.ORG References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4i Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG * Steve Warwick [20021031 05:19]: > Hi, > > I have sendmail / qpopper running on a production machine and have yet to > figure out a way to open mail up to my client sin a secure way. [snip] > Is there a way to do this that will not open my machine up to abuse? POP-before-SMTP. Open to abuse depends on your definition, but it is generally safe: in order for someone to send unauthorized mail through your smtp server, they would have to spoof the IP address from where your client is connecting within a small time frame (tipically 10 min.) I use qmail (http://cr.yp.to/qmail.html) and relay-ctrl (http://untroubled.org/relay-ctrl/). If you are holding virtual domains (and mail accounts), you might also want to try vmailmgr (http://untroubled.org/relay-ctrl/). I use this software to serve several virtual domains without a hitch. qvb -- pica To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message