Open the pop-up menu of the message you wish to send as ASCII text, and select 'Open as / RexxMail - ASCII/Quoted-Printable'. The message icon will change to show 'ASCII' stamped across the envelope.
The 'ASCII/Quoted-Printable' menu option acts as a toggle. If you decide you want to send the message as quoted-printable text after all, simply select the option once again. The message icon will change back to its previous state to show the effect.
When RexxMail sends a message as ASCII text, it converts 8-bit content by replacing non-ASCII characters with the closest available ASCII match to ensure that the text remains legible.