Email notifications from Redmine with sendmail of exim.

sysnetb@vh36 [~/]# cat config/configuration.yml | egrep -A 6 '^default'
default:
  # Outgoing emails configuration (see examples above)
  email_delivery:
    delivery_method: :sendmail
    sendmail_settings:
      location: /usr/sbin/sendmail
      arguments: ""
sysnetb@vh36 [~/]#