I run a local server using mandriva.
MySQL, php, postfix, apache.
My problem is with my postfix.
It receives emails fine, the problem is sending.
I have set it up to send mail recieved to a bigpond account.
That works ok. When i use a email form on my server that works also.
But if i try a gmail account or a yahoo account then it fails.
Actually it goes further. I run a forum from my server and it can only email to myself and only if its a bigpond address. If i change it to gmail it fails as image below.

As you can see time out time out.
Would love to know what im doing wrong here.

Any help would be appreciated.