Getting response by email reply message

[zljubisic at gmail.com]

Hi,

I know how to send an email, but I would like to be able to receive a reply and act accordingly.
Mail reply should contain yes/no answer.

I don't know whether email is appropriate for such function.
Maybe better idea would be to have links in email body, one for yes, another for no that will execute something on the server.

Anyway, what are my options?

Regards.