Troubleshooting delivered messages
Sometimes you might see a "Delivered" state for an email to a parent or guardian that they are saying they have not received. In these instances it is most likely that the email message is being filtered by their Spam or Junk mail filters and the message is likely to be found in their Spam or Junk mail folder. Get the parent to search these folders or to do a global search on their mail service for the sender of your REACH emails.
(Go to System Config > Communications > Email From Address to get your sending email address)