If Sendgrid activity reporting shows that a guest or admin user is receiving marketing emails but they are not receiving them, then the issue is on the receiving side. In order to rectify, local IT will need to be consulted in case there were any recent changes made to network policies or Internet Service Providers / Domains, etc.
Disclaimer:
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
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)