What's the trick again to have it default to showing text/plain instead of

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In-reply-to Harlan Feinstein <harlan@feinsteins.net> message
    dated "Sat, 24 Aug 2002 09:31:22 -0400."
Re: defaulting to showing plaintext versions of e-mails
From exmh-users-admin@redhat.com  Mon Aug 26 15:24:35 2002