define external function MailOutBoxGetStatusReport
          value MailOutBox this-MailOutBox
     into modifiable stream report

If the MailOutBox is not in error, this function clears the report shelf; if the MailOutBox is in error, the function populates the report shelf with one or more error messages (each as an item on the shelf).

MailInBoxGetStatusReport can be called at any time, but will return an empty report shelf if there is no error.

Arguments:

• "this-MailOutBox" is an opaque object of type MailOutBox.
• "report" is the stream shelf in which the error messages are stored.

Example:

  MailOutBoxGetStatusReport MyBox into report
  repeat over report
     put #error report
  again