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Re: [tor-talk] tordns incapable of MX lookups (was Basics of secure email platform)

To: tor-talk@xxxxxxxxxxxxxxxxxxxx
Subject: Re: [tor-talk] tordns incapable of MX lookups (was Basics of secure email platform)
From: Conrad Rockenhaus <conrad@xxxxxxxxxxxxxx>
Date: Sat, 23 Nov 2013 22:30:57 -0500
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On Sat, Nov 23, 2013 at 8:04 PM,  <tor@xxxxxxxxxxxxxxxxxx> wrote:
>> >>   1) Create a list of tor exit nodes that do not block port 25
>> >>   2) Command the tor daemon to exit those nodes exclusively.
>> >SSL-SMTP configured to works over 465 port in most cases.
>> On Windows Yes.
>> SMTP over ssl/tls is configured on port 25. Starttls, aca
>> submission, is configured for port 587
>
> You guys are getting hung up on the wrong thing.  Before talking ports
> (which is a non-issue), realize that tordns cannot do an MX lookup.
> This remains the biggest hurdle to sending mail.
>
> Postfix must run with a transparent proxy (no SOCKS proxy capability),
> so it relies wholly on tordns for MX lookups.
>
> Torsocks has a (now broken) feature to disable TorDNS.  If tordns
> could be disabled, then postfix could do an MX lookup.  It would be a
> leak, but at least it would work.  At the moment, the tordns disabler
> has been removed, so there is no hope of running a mail
> server... Unless someone comes up with a SOCKS-capable mail server.

Well, there's a way to get this done, but it's not a *nix based
solution.  You can utilize ISA Server, Microsoft Exchange, and the
Socksv4 firewall client.  Use the ISA Server to centrally connect to
Tor, use the Socksv4 client to let Microsoft Exchange connect via
socks to the client.  It's something I'm willing to try out and see if
it works if anyone wants to know the results of such test, but I'm
pretty sure this type of solution should work.

-Rock

-- 
Conrad Rockenhaus

http://www.rockenhaus.com/
http://www.lagparty.org/~conradr/

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References:
- Re: [tor-talk] Basics of secure email platform
  - From: tor
- Re: [tor-talk] Basics of secure email platform
  - From: unknown
- Re: [tor-talk] Basics of secure email platform
  - From: Elrippo
- [tor-talk] tordns incapable of MX lookups (was Basics of secure email platform)
  - From: tor

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