Email notification: having error when I setup a local mail

Hi everyone,

I am trying to set up a notification email but I got error message when I try test the email.

An error occurred while sending mail (getaddrinfo: ?v?????????O??L????????A?v??????????f?[?^?????????????????B )

My setting config is below

email_delivery: 
    delivery_method: :smtp 
    smtp_settings: 

      address: mycomputer
      port: 25 
      domain: mydomain

Please help me. Thank you.

Redmine