Egnyte maintains a list of public IP addresses for customers that require an allowance rule. You can see all of the public IP addresses for Egnyte Connect here.

Egnyte Protect has a separate mail server IP address that may need to be allowed in your email server.

Component IP
Mail Server 167.89.108.82

Alert emails from Egnyte Protect are sent from the address alerts@egnyteprotect.com.