Ben Parker says,

> Have her send you an email directly.  Look in the extended headers
> for a Sender: field with a different address.  As documented,
> Sender: overrides From: and can cause this error if the Sender:
> address is different.  Sender: is unusual in personal email, but
> common in email re-sent by other agent programs (such as LISTSERV).
>  Netscape on unix has a default configuration setting that
> generates an invalid Sender: field.

As far as I can see this is the full set of headers on the message
the list refused. There doesn't seem to be any Sender" field.

                                  -- Russ
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