Redmine

Hello all, I was able to get redmine successfully installed on a virtual server and it's working great. The only issue I'm having now is trying to get email configured. more info below.

I have installed redmine on a few different systems. I've used bitnami for most of them. Setting email up with bitnami has never been an issue when it ran as an app on a mac OSX machine. I just recently installed redmine on a virtual linux server (CentOS 6 64bit). But I can not get email configured correctly. I even went as far as to take my same configuration.yml settings and pasted them into the linux version and still no luck.

Can someone lend me a hand getting this configured? Is there something in the linux server I need to adjust? It's a brand new install on a brand new server (nothing else installed)

settings below:

default:
  # Outgoing emails configuration
  # See the examples below and the Rails guide for more configuration options:
  # http://guides.rubyonrails.org/action_mailer_basics.html#action-mailer-configuration
  email_delivery:
    delivery_method: :smtp
    smtp_settings:

      address: mail.mydomain.com
      port: 426
      domain: example.net
      authentication: :login
      user_name: no_reply@mydomain.com
      password: *password*

Here is the error I get when I try to send test email from redmine:

'An error occurred while sending mail (hostname does not match the server certificate)'

Any help will be greatly appreciated!