How to let mutt display a '@' in the index mode for attachment?

To: mutt-users@xxxxxxxx
Subject: How to let mutt display a '@' in the index mode for attachment?
From: Zhiqiang Ye <yezhiqiang@xxxxxxxxx>
Date: Fri, 9 Dec 2005 23:06:41 +0800
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Hi, all

     How can I write my muttrc for display a '@' in the index mode, if
the email has attachment included?

    Thank you very much.

Yezq

Follow-Ups:
- Re: How to let mutt display a '@' in the index mode for attachment?
  - From: Michael Tatge
- Re: How to let mutt display a '@' in the index mode for attachment?
  - From: Jonas Jacobsson