Subject: Wikipedia e-mail =?UNKNOWN?B?5Pb8?=
[snip]
Hello! testing =E4=F6=FC...
which has subject "Wikipedia e-mail äöü" and contents "Hello! testing
äöü...".
note what was quoted... I looked at the headers, and it had:
X-MIME-Autoconverted: from quoted-printable to 8bit by [my ISP's mail
server]
Hmmm?
-- Jake