Hello Matthew

>In Outlook Express 5 and up go to Tools > Options > Send > and click on Plain Text settings next to Mail Sending Format. The popup gives you the option to choose the punctuation of your desire.

Thanks, the solution worked great! I had never noticed or investigated what settings were 'under' that button, and the help never implied where to set it.
A pleasant way to begin a day at work after 2 sick days.