Hi @Serhii_
Integrating structured data markup into transactional emails to generate Gmail Summary Cards poses a challenge.
- Since Gmail’s Summary Cards rely heavily on structured data to extract key information, implementing this feature requires email platform support for embedding such markup, which appears to be a restriction.
This limitation is not unique to HubSpot, as many email platforms struggle with implementing structured data due to the complexities of email client rendering and security measures.
Hope this helps - Happy to help further!!
Thank you very much and have a great one!
Warm regards