Redmine

Hello,

I have installed the ruby Redmine application and everything seems to work fine .
However, I can not manage to make the email notification working.
When I try to send email for recover password for instane, I get this error message :
"No connection could be made because the target machine actively refused it - connect (2) check your configuration in config/email.yml."

Here is my email.yml configuration :

production:
   delivery_method: :smtp
   smtp_settings:
     address: "ip address of my exchnage 2007 server" 
     port: 25
     authentication: :login
     domain: mydomain.name..com'
     user_name: 'my_username'
     password: 'my_password'

I have also tried diffrent configuration ( with TLS and without,with plain authentication etc. )but no luck. same error everytime.
I think the redmine does not even try to request my exchnage server at all... I did not see any request comming in the exchnage.
there is no firewll blocking and I can telnet my Exchnage server and send emails .
I also tried to restart the Exchnage server and the redmine server as well but still no luck.:-(
I will be happy to send more information if needed.
Please help
Thanks in advance.