Email response to update a date field located in the Deal module.

Email response to update a date field located in the Deal module.

Hello All,

Please help. Here's what I want to do. I want to send an email to one of my vendors and I would like if he can reply to the email with a date he can visit a customer's house. With the reply, is there a way that a date field located in the Deal module (or any module) be updated automatically per my vendor's response? 

Thank you,