I don't think you'll find that easy to do.
With an Email plug in that supports HTML coding, you may be able to include a response link in the body of the email. CLicking such a link could open a web published FileMaker data base where they could log their reply.
That would work.
Do you know if I can send a link a to certain layout/record?
IE "Click here to answer ?" they click, log in, then go right to they layout with the record selected?
Not with Instant Web Publishing. Custom Web Publishing? Don't know, maybe... Your email could include a log in password and then a script that runs when the file is opened by a web client could check the account name of the user to determine what layout and record to pull up for them...
I found a plug in that will do what I wanted.
I have the demo running in a test enviroment and so far it meets my needs.
Now if I can get the OK to spend the money.....