That depends on the sending mailer -- and also possibly any gateways in
between. Most mailers have a setting that switches it between sending
8-bit characters as "quoted-printable" (mostly useful if you don't have
an 8-bit clean path between sender and receiver) and transmitting raw
8-bit characters (any other time). Since you don't say what mailer the
sender used, I can't tell exactly how.
It has happened to me that I've been told that my mails ended up as
quoted-printable even though I sent them with Yarn which doesn't have
that as an option. It turned out that it was my ISP's "sendmail"
program (which is used by uqwk) that did it.
> I have also included an charset=ISO-8859/1 statement in the YARN config
> statement.
That should be:
charset=iso-8859-1
Yngvar