I'm trying since a couple of days to establish a TLS connection to a SMTP server in PHP via fsockopen() on my newly installed Ubuntu server. I#ve tried almost everything and googled for hours but still I didn't get it working.

The PHP code looks as follows:

```
$fp = fsockopen("tls://smtp.xxxx.com", 25, $errno, $errstr, 30);
if (!$fp) {
    echo "$errstr ($errno)<br />\n";
} else {
 // some other stuff
}  

```

The output is just (0), i.e., $errstr = null and $errno = 0.

OpenSSL is installed and enabled:

```
OpenSSL support: enabled
OpenSSL Library Version: OpenSSL 0.9.8o 01 Jun 2010
OpenSSL Header Version: OpenSSL 0.9.8o 01 Jun 2010

```

and the following stream socket transports are registered:
tcp, udp, unix, udg, ssl, sslv3, sslv2, tls.

The port is open as a telnet from the console works.

Any ideas what's wrong or how I could at least get some more debug output?

Thanks,
Markus