OpenSUSE Network :: 11.4 - Mailx Not Working (Message Not Sent)

I am running a opensuse 11.4 with mailx 12.2. I am trying to sent emails via command line using mailx. I have not configured any mail server in yast. My .mailrc in my homefolder looks like this:

set smtp-use-starttls
account gmx {
set smtp=mail.gmx.net:465
set smtp-auth=login
set smtp-auth-user=my.name@gmx.de
set smtp-auth-password=mypassword
set from="My name <my.name@gmx.de>"
}

Unfortunately when I use the command
mailx -s"Test" -A gmx my.name@gmx.de [Return]
Hallo
[ctrl+d]
I am getting only the message
Unexpected EOF on SMTP connection
"/home/myname/dead.letter" 11/338
. . . message not sent.