On 3 December 2010 23:18, Alona Rossen <arossen_at_opentext.com> wrote:
> We use openssl with libcurl to programmatically access, upload to and
> download from various URL’s using https, ftps, and smtps protocols. We can
> successfully perform our tasks on  UNIX/Linux and Windows boxes, including
> Solaris on SPARC and Intel, Linux, etc. However, we consistently receive the
> following type of error message when we attempt to access SSL URL from our
> AIX5.3 and AIX6.1 boxes:
>
> INFO_TEXT:
> SSLv3, TLS handshake, Client hello (1):
>
> INFO_TEXT:
> Unknown SSL protocol error in connection to smtp.gmail.com:587
>
> We use OpenSSL 0.9.8e and 0.9.8p. We use libcurl 7.21.0.
> We have verified that correct installation of OpenSSL is being used.

This sounds like it might be more of an OpenSSL problem than a libcurl problem.

Is the openssl command able to connect:

$ openssl s_client -starttls smtp -connect smtp.gmail.com:587

-- 
Michael Wood <esiotrot_at_gmail.com>
-------------------------------------------------------------------
List admin: http://cool.haxx.se/list/listinfo/curl-library
Etiquette:  http://curl.haxx.se/mail/etiquette.html