How to check email events/status for every email we are sending to the users.

Also, make sure to upvote these ideas:

https://community.hubspot.com/t5/HubSpot-Ideas/Attachments-for-transactional-emails/idi-p/487720

https://community.hubspot.com/t5/HubSpot-Ideas/Add-file-attachments-to-marketing-mails/idi-p/33683