On Thu, Dec 15 2011, Rene wrote:

> emacs-version "24.0.92.1"
>
> I didn't encounter any problem using the smtp protocol on port 25.  But now that
> my company has turned to a secured smtp server I now should be using the smtps
> protocol on port 465. Unfortunately I cannot seem to make this work.  
>
> Besides I don't get any error message at all which leaves me with no clue on how
> to debug this problem although both `smtpmail-debug-verb' and
> `smtpmail-debug-info' are set to t.
>
> *Here is my configuration*
>
> (setq smtpmail-smtp-server "smtps.company.domain.name")
> (setq smtpmail-smtp-service 465)
> (setq user-mail-address "my.name@domain.name")
> (setq smtpmail-local-domain "domain.name")
> (setq smtpmail-smtp-user "loginName")

Try to add :

    (setq smtpmail-stream-type 'ssl)

-- 
Julien Danjou