I just checked my Eudora and the only place I find any setting regarding
"encoding" is in the attachment section, where there are 3 possible choices.
"Mime", "BinHex" and "Uuencode".  Mine is set to Mime, if that helps any at all.

At 08:15 PM 2/19/97 -0800, you wrote:
>I just got through de-bugging some output on a list that did the same thing
>when saved (it wasn't visable in my reader)  The person sent 6 messages, 5 had
>these same characters when the message was saved as text, and one (sent in the
>middle of the batch) didn't.  These messages were sent on Windows Eudora Lite
>version 1.5.2.  The ones with weird characters were:
>
>Content-Type: text/plain; charset="iso-8859-1"
>Content-Transfer-Encoding: quoted-printable
>
>The one without the characters was:
>
>Content-Type: text/plain; charset="us-ascii"
>
>With no Content-Transfer-Encoding flag.
>
>I'm not familiar with Eudora, so I have no idea how it came to have the change
>in the middle, unless perhaps there was a font change or simular.
>
>Liz
>
>~~@~~@~~@~~@~~@~~@~~@~~@~~@~~@~~@~~@~~@~~@~~
>          Liz & the Terv Herd
>  Somewhere on the beautiful Oregon coast
>              Spiritbrook
> Working Labradors, Siberians, Tervuren
>            John 4:14
>~~@~~@~~@~~@~~@~~@~~@~~@~~@~~@~~@~~@~~@~~@~~
>[log in to unmask]
>http://www.harborside.com/home/l/lizm
>