When I use Sendgrid to send calendar appointments from my domain name, I get the following appointment without the ICS attachment, which looks and operates very differently from the appointment sent from the bubble.is domain.
Open the attached ICS to put the appointment in your calendar.
summary: My appointment
start: Sun Nov 27 2016 10:46:59 GMT+0000 (UTC)
end: Sun Nov 27 2016 11:46:59 GMT+0000 (UTC) min
description: Try this
How can we send calendar appointments in ICS format from our own domain name (instead of using bubble.is)?