Jon wrote:
> I'm attempting to use stunnel between pop3s and pop3 to secure mail
> traffic sent to a proprietary mail daemon that doesn't know pop3s.
>
> When running stunnel3 -c -d pop3s -r 127.0.0.1:110 -f then connecting
> with Thunderbird once the exact output is:
>
> 2008.02.19 12:49:43 LOG5[29282:3086603968]: stunnel 4.21 on
> i686-pc-linux-gnu with OpenSSL 0.9.8b 04 May 2006
> 2008.02.19 12:49:43 LOG5[29282:3086603968]: Threading:PTHREAD
> SSL:ENGINE Sockets:POLL,IPv6 Auth:LIBWRAP
> 2008.02.19 12:49:43 LOG5[29282:3086603968]: 500 clients allowed
> 2008.02.19 12:50:03 LOG5[29282:3086601104]: stunnel3 accepted
> connection from 10.1.1.126:38782
> 2008.02.19 12:50:03 LOG5[29282:3086601104]: stunnel3 connected remote
> server from 127.0.0.1:45209
> 2008.02.19 12:50:03 LOG3[29282:3086601104]: SSL_connect: 1408F10B:
> error:1408F10B:SSL routines:SSL3_GET_RECORD:wrong version number
> 2008.02.19 12:50:03 LOG5[29282:3086601104]: Connection reset: 0 bytes
> sent to SSL, 0 bytes sent to socket
>
>
> Thunderbird hangs on "Connected to".
>
This error message would typically be seen when talking plain POP3 with
a POP3S server. There are two ways to communicate via POP3 with SSL/TLS:
use plain POP3 and issue "STLS" as first plaintext command to "Start
TLS" mode or use POP3S on a special port (995) where the SSL handshake
takes place first.

Best regards,
   Lutz
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