Redmine

Hi there,

I'm running Redmine 1.3.0 using an SQLite Database.
After setting up my account data in the configuration.yml file, it works just fine. But a couple of hours later the email notifications stop working. When I try to send a test email, Redmine will only display "An error occurred while sending mail (Input/output error)", which is not very helpful for me. There is also no entry about this in the log file.
Because it works for some hours I think there is everything allright in the configuration.yml, but it may help anyway:

production:
  email_delivery:
    delivery_method: :smtp
    smtp_settings:
      tls: true
      enable_starttls_auto: true
      address: "smtp.gmail.com" 
      port: '587'
      domain: "smtp.gmail.com" 
      authentication: :plain
      user_name: "xxxx@googlemail.com" 
      password: "xxxxxxxx"