The Email bridge enables people to contribute in a conversation while not having to use a matrix client. To invite someone's email address:
@_email_test=40gmail.com:t2bot.iowould be firstname.lastname@example.org)
The user may unsubscribe at any time by clicking the link in the email. They'll be able to reply to each email to post a message back to the room.
The Email bridge is a third-party bridge not maintained by t2bot.io/turt2live. To learn more about the bridge, or to contribute, please see kamax-io/matrix-appservice-email on Github.