The mailing list and "content-type"

[Kenneth Brody]

I just noticed this on a message sent to the list and cc'ed to me.  The 
"Content-type" header line was changed by the mailing list software.

The one sent straight to me says:

     Content-type: text/plain; charset=ISO-8859-1; format=flowed

The one through the list says:

     Content-Type: text/plain; charset="us-ascii"

Is this typical of mailing lists?

-- 
Kenneth Brody