Email report autotext changes possible?

New here, first post :-). Please tell me if I can change the text of the auto email that is produced for reports. I know the ability to write our own text on the first page of the report is possible but limited and is not enough for my customer text, so I want to write my own text in the email, so my customers know exactly what they get and what some of the report info means. Is this possible?
Thanks
Sara