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Using TLS to encrypt SMTP traffic...
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Marc Haber
*nix forums Guru


Joined: 20 Feb 2005
Posts: 646

PostPosted: Thu Jul 20, 2006 10:17 pm    Post subject: Re: Using TLS to encrypt SMTP traffic... Reply with quote
On Fri, 21 Jul 2006 04:42:36 +0800, W B Hacker <wbh@conducive.org>
wrote:
Quote:
I *have* "illustrated", but NOT RECOMMENDED use of port 587 with tls_on_connect.

Well, kindly stop doing this, you're confusing the newbies who will
come back for more support.

Greetings
Marc

--
-------------------------------------- !! No courtesy copies, please !! -----
Marc Haber | " Questions are the | Mailadresse im Header
Mannheim, Germany | Beginning of Wisdom " | http://www.zugschlus.de/
Nordisch by Nature | Lt. Worf, TNG "Rightful Heir" | Fon: *49 621 72739834

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## Exim details at http://www.exim.org/
## Please use the Wiki with this list - http://www.exim.org/eximwiki/
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Tony Finch
*nix forums Guru


Joined: 22 Mar 2002
Posts: 1222

PostPosted: Thu Jul 20, 2006 10:51 pm    Post subject: Re: Using TLS to encrypt SMTP traffic... Reply with quote
On Fri, 21 Jul 2006, W B Hacker wrote:
Quote:

http://www.ietf.org/rfc/rfc4409.txt

- Section 3 mentions other security methods, including IPSEC and SSL
tunneling.

It does not mention SSL anywhere. It does mention tunnelling, but such
tunnelling would not be visible at the level Exim is operating - think
of port forwarding with ssh or stunnel. Tunnelling protocols have their
own port allocations or protocol numbers, so it would be weird to run them
over port 587.

TLS-on-connect on port 587 is NOT supported by IETF specifications.

Tony.
--
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