The Sandbox instance of your brand is used for testing changes and updates to the software before taking the changes live in the Production environment.
If none or some users are receiving the 'Password Reset' email, email domains have probably not been properly white-listed.
There is setting within the Cockpit section of the platform that allows for email domains to be white-listed.
In an effort to supply information as quickly as possible, this article has been published prior to a formal technical review, and is subject to factual, grammatical, and various structural errors. Data may be incomplete, misordered, or incorrect.
This additional disclaimer will be removed upon formal review of this article. The standard Punchh Inc. KB Disclaimer still applies, and can be found at: https://support.punchh.com/hc/en-us/articles/360040100273-Punchh-Inc-Knowledge-Base-Disclaimer