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Yahoo blocking emails from Horizon...

Below are instructions for whitelisting our emails specifically for Yahoo email accounts:
  1. Click CONTACTS in the top-left corner of your Yahoo! Mail page.
  2. Click New Contact.
  3. Enter "Horizon" (or something similar - whatever you want) as First Name.
  4. Enter as Email address.
  5. Click Save
  6. Repeat steps 2 through 5 for the email addresses:

If you encounter any problems, contact Yahoo Support.

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