Through the add-on you can create cards or comment to existing cards in Trello from Gmail.

Features:
- Create a new card from an email's subject, message and attachments too
- You can add a comment to an existing card if you do not want to create a newone
- Also, you can upload an attachment to an existing card
- Remembers previous board and list
- Adds a link on Trello card to the original email
- Supports adding a due date, members and labels to the newly created card