It's in the headers of the message, as of mailman-2.0 and above.
Check the headers of this message.
"Harry L. Styron" wrote:
>
> Federal law will or does require information in mass mailings on how to
> unsubscribe from lists. Can the footer in Mailman be altered to include
> text to conform with this requirement?
>
--
Téo de Hesselle
Email Administrator
Information Technology Division
University of Technology, Sydney
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