Sending test mail throws exception

Hello

I configred the Email section at setup with my gmail account. Testing it gives following error:

Can't send email to ****@gmail.com. Mail server connection failed; nested exception is javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 587; 
nested exception is: java.net.ConnectException: Connection refused: connect. 
Failed messages: javax.mail.MessagingException: Could not connect to SMTP host: smtp.gmail.com, port: 587; 
nested exception is: java.net.ConnectException: Connection refused: connect

I also tried with my companies smtp, but this also does not work.

Any idea what is going wrong?

Thanks

Mark