Send Mail Automation

Use Case - I want to add some information which is added automatically in the body of the mail before sending it out.Please suggest a solution to do so.

You mean this way? i know its straight foward, but what kind of automatic are you talking about.

I want to include some keywords from a mail on which we are replying, I wanted to know if we can add such keywords to the body of the mail that we want to send.
Note : These keywords might change from mail to mail, eg ID number of a student, Drivers license number etc.

Read the replying email body as string and replace those keywords with the variables you need (if else) and send the new string in the email body.

Thank you, that will do it