nanog mailing list archives
Re: Mail Submission Protocol
From: Tony Finch <dot () dotat at>
Date: Thu, 22 Apr 2010 12:07:49 +0100
On 22 Apr 2010, at 00:07, Franck Martin <franck () genius com> wrote:
Consider also smtps port which should be treated like smtp port and not like submission port, or simply do not listen on smtps as TLS is available on smtp port via esmtp.
Er, no. TLS-on-connect aka smtps (as opposed to STARTTLS) is only used to support Microsoft MUAs that are more than a couple of years old. They only supported STARTTLS on port 25 and insisted on using the deprecated TLS-on-connect mode on all other ports. This meant they could not support standard Message Submission on port 587. Therefore you should treat smtps (TLS-on-connect on port 465) as the special Microsoft version of RFC 4409 message submission. That is, treat the protocols exactly the same wrt authentication, authorization, firewalls, address validation, etc.
Tony. -- f.anthony.n.finch <dot () dotat at> http://dotat.at/
Current thread:
- RE: Mail Submission Protocol, (continued)
- RE: Mail Submission Protocol Alex Kamiru (Apr 21)
- Re: Mail Submission Protocol Suresh Ramasubramanian (Apr 21)
- Re: Mail Submission Protocol Franck Martin (Apr 21)
- Re: Mail Submission Protocol Suresh Ramasubramanian (Apr 21)
- Re: Mail Submission Protocol Dave CROCKER (Apr 22)
- RE: Mail Submission Protocol Alex Kamiru (Apr 21)
- Re: Mail Submission Protocol Jakob Schlyter (Apr 21)
- Re: Mail Submission Protocol Franck Martin (Apr 21)
- Re: Mail Submission Protocol Raoul Bhatia [IPAX] (Apr 22)
- Re: Mail Submission Protocol Jeroen van Aart (Apr 27)
- Re: Mail Submission Protocol Tony Finch (Apr 28)