In Zoomforth, we have two email token types used for authentication in the Visitor Access Settings of a site, we have Approved Emails or Multi-Factor. The email token type is an authenticator that allows users to authenticate themselves by clicking a Secure Link or using a Multi-factor Authentication code as a one-time password (OTP) for temporary access.
The Secure Link or OTP is sent to your listed Approved Emails as an email message, this will help verify if the person making the sign-in attempt is the intended user. If the user doesn't click the Secure Link or use the OTP within the set expiration window, the user won't be able to access the site.
Visitor Access Settings can be set or changed in a site by following the steps below:
Go to your Site Editor.
Hover your mouse to the site that you want to set/change the Visitor Access Settings.
Click the Details button for the site.
Select the Visitor Access tab to view the Visitor Access Settings.
The email token type is only available if the selected Visitor Access Settings of a site is set to Approved Emails or Multi-Factor.
Scroll to the bottom of the page and look for Email token type.
There are two options that we can use, one is to "Expire after 24 hours" and the other is "Expire after single use". This means that the visitor's access to the site will only be on the given timeframe in the selected email token type once they receive it.
See the article Adding allowed visitor email address to learn how to add your visitor's email address to the site.