Check for email recipient info in bounce emails
Check for email recipient info in bounce emails

# Isaac emails all have a footer which details the email address an email
# is sent to. Check to see if this is present before trying to find the most
# common email, since this footer will always be correct if present.

ucam-cl-dtg/isaac-content-scripts,ucam-cl-dtg/isaac-content-scripts,ucam-cl-dtg/isaac-content-scripts