If you've resubscribed a guest on their timeline using the checkboxes at the bottom of Edit Profile but they subsequently are not receiving emails, please contact Sendgrid support to check the status of the guest's email address with regards to the suppression lists within Sendgrid
Below is a linked article that explains the 9 different email events:
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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