Date: Sun, 12 Aug 2007 16:41:37 +0200 From: Per olof Ljungmark <peo@intersonic.se> To: Erik Norgaard <norgaard@locolomo.org> Cc: FreeBSD Questions <questions@freebsd.org> Subject: Re: Best practice for SMTP relay with user authentication Message-ID: <46BF1C21.9040105@intersonic.se> In-Reply-To: <46BEFE79.1040108@locolomo.org> References: <46BEFE79.1040108@locolomo.org>
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Erik Norgaard wrote: > Hi: > > I have my postfix authenticate users before accepting mail for non-local > delivery. Till now, users can connect to port 25 and 465 (smtps) use > STARTTLS and authenticate. > > But, I stumbled upon submission port 587 which is not reserved - it > appeas - for a protocol but for a use? > > I'd like to align my configuration with best practice. Should I just > move postfix to bind to port 587 or did I misunderstand that submission > is indeed a different protocol? Is there any best practice for which > protocol should be used for submission? I'm not an authority on the subject but we use it here for server-to-server. Here's a link to more reading: http://www.faqs.org/rfcs/rfc2476.html We use port 465 for authenticated MUA-to-MTA. Per olof
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