anchor.diff:  
   * `email_notifications`: Set to `true`.
   * `email_recipients`: Provide a comma-delimited list of recipient addresses.
  -* `smtp.from`: Provide the e-mail address of the sender of the notifications. For example, `notifications@example.com`.
  +* `smtp.from`: Provide the email address of the sender of the notifications. For example, `notifications@example.com`.
   * `smtp.host`: Provide the address of the SMTP server. For example, `smtp.example.com`.
   * `smtp.port`: Provide the port of the SMTP server. For example, `25`, `465`, or `587`.
   * `smtp.domain`: Provide the SMTP EHLO domain. This is typically the server's FQDN, such as `cloudfoundry.example.com`.
  
positive.code: 
  1. You can enable notifications by e-mail, PagerDuty, AWS CloudWatch, DataDog, OpenTSDB, and Graphite. Follow the instructions below for the appropriate plugin.
  
  ###<a id='email'></a> Configure E-Mail
  
  <%= vars.email_notifications %>
  
  
negative.code: * `user`: If you set `auth` to `plain`, provide the username for SMTP authentication.
  * `password`: If you set `auth` to `plain`, provide the password for SMTP authentication.
  
  To customize the contents of your notification email, see the [Getting Started with the Notifications Service](notifications.html) topic.
  
  ###<a id='pagerduty'></a> Configure PagerDuty
  
  