# Safelisting URLs & Emails

### Safelisting URLS & Emails for Horizon Education

Safelisting, or a safelist (allowlist), is a cybersecurity strategy that approves a list of email addresses, IP addresses, domain names, or applications while denying all others. This is mainly for your IT administrators to use as a list of sites to allow just in case they get caught by IT protection.

**Please safelist the following addresses:**

​<portal@progresslearning.com>​

<support@horizoneducation.com>

​<info@horizoneducation.com>

\*.horizoneducation.com

horizoneducation.com​

​\*.learnosity.com​

**The Email Server Domain:** [em9734.horizoneducation.com](http://em9734.horizoneducation.com/)

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