Sometimes you may find that emails from external addresses end up in your quarantine mailbox. To get around this you can add them to your safe sender list by doing the following:

  1. Go to on your web browser
  2. Open settings via the cog in the top right
  3. Search for "Safe senders"
  4. Press the add button under the Safe senders title
  5. Type the email address in and press the enter key

Or click this link and follow from steps 4: