[log in to unmask] (Alexandre E. Kopilovitch) quoted and then wrote:

>>Ban anything other than simple ASCII.  If an attachment or
>>fancy formatted version is desired by some recipients, give a pointer to it.
>One may imaging some automation: an attachment is automatically moved from
>article to the associated (with the mailing list) website, and corresponding
>URL appears on its place (with the label "see attacment: ").

But that does nothing to cure the problem at the source --
making the _sender_ use self-control.