Many users request this.
Here's the argument against it:
- Dialogue offers a complete log of a conversation.
- In email we expect to Reply with one keystroke.
- However, email replies cannot be merged into the Dialogue.*
- Hence, the log can only be complete if everyone uses Dialogue to send replies.
- It's perhaps helpful to force everyone to use Dialogue to read the message body.
*As far as I know, no one is working on an inbound mail-handler for Dialogue.