Comment 8 for bug 266068

I don't know exactly when it was fixed, and the fix may have been to the Python email package rather than to Mailman itself, but it was fixed way before 2.1.9.

I see the issue in your archive, but do the following:

$ cd to the Mailman installation
$ bin/withlist -i
No list name supplied.
Python 2.6.1 (r261:67515, Dec 27 2008, 17:04:27)
[GCC 3.4.4 (cygming special, gdc 0.12, using dmd 0.125)] on cygwin
Type "help", "copyright", "credits" or "license" for more information.
(InteractiveConsole)
>>> import email
>>> email.__version__
'4.0.1'
>>> (control-D to exit)

'$ ' is a shell prompt; '>>> ' is a Python prompt; the rest is output.

What are the Python and email versions?

Also, find the message in the archives/private/iaep.mbox/iaep.mbox file. Is the "From " there unescaped?

Was the "From " escaped in the message you received from the list?