Subject: bug#14380: 24.3; `network-stream-open-tls' fails in some imap servers on w32

From: Eli Zaretskii <[email-masked]>
Date: Fri, 10 May 2013 20:17:25 +0300

> From: João Távora <[email-masked]>
> Date: Fri, 10 May 2013 17:00:32 +0100
> Cc: [email-masked]
> 
> If the builtin tls fixes this and its the "recommended way" it should
> be the default no?

It _is_ the default, AFAIK, but you need to install the GnuTLS
libraries (DLLs) for it to work.  Try installing this one:

  http://sourceforge.net/projects/ezwinports/files/gnutls-3.0.9-w32-bin.zip/download

> btw: how to I configure emacs to use builtin gnutls?

I think you just need to install the above (and restart Emacs, if it's
already running).