Mac OS X Mail: Printed text is unexpectedly large or small

Text in email messages you print, with Mac OS X 10.2.8 or earlier, has an unexpectedly large or small font size. The same thing happens if you create a PDF file of an email message.
This happens because Mail in Mac OS X 10.2.8 or earlier automatically scales printed text based on the width of your Mail message window. The wider the window, the smaller the printed text.

What can you do? Before printing or saving as a PDF, change the size of the window by positioning the pointer over the lower-right window corner (the resize control) and dragging.

Or you could do this:
Tip: You can preview the printout by clicking the Preview button in the print dialogue.
Published Date: Oct 10, 2016