Tom's dashboard

Let's say I've just met someone interested in doing business with my company. They want to set up a meeting so I say, "Just email my assistant." and provide them with Sandy's email, i.e. the email I use when I want to remind her of things.

I realize that the person that wants to meet with me may not use the correct Sandy jargon (i.e. "Sandy, remind Tom he has a meeting with me on . . . ) but is it possible to see a copy of the email they sent, or have it forwarded to my inbox?

Will they get anything back from Sandy since they are emailing her from an email address she does not recognize?