Configure firewall settings for Zoho Mail


Posted by Nishi on 24 June 2025


Configure your firewall settings and allow your organization members to access Zoho Mail without any restrictions. All of the below-mentioned domains have to be whitelisted even if you don't see activity at those addresses. Because, even if there is no activity at a point, there are high chances for the links to have future activity. And if you haven't whitelisted any of the domains below, it may result in difficulties to connect with a particular service or more offered by Zoho Mail.

Domains

Exclude TCP and Web Socket protocols for the following domains from your firewall and proxy settings.

  • *.zoho.in 
  • *.zohostatic.in
  • *.zohocdn.com
  • *.zappsusercontent.in
  • https://fonts.gstatic.in
  • https://fonts.zohowebstatic.in
  • wss://mailws.zoho.in 
  • wss://mailwsorg.zoho.in 
  • wss://mailwsfree.zoho.in

Note:

The asterisk (*) can be replaced with any values except for period (.).

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