What limitation are you encountering that leads you to conclude that you can only send it as a PDF attachment?
This could indeed be the case, but it depends on exactly what you need to do.
Emails from FileMaker are plain text so sometimes you have to choose between:
a) use a simpler plain text form of output to put what is needed into the body of the email.
b) attach a PDF
c) acquire an email plug in and learn how to use it to generate HTML formatted emails that produce the results that you need.