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You may also have configured mutt to co-operate with Mixmaster, an
anonymous remailer. Mixmaster permits you to send your messages
-anonymously using a chain of remailers.
+anonymously using a chain of remailers. Mixmaster support in mutt is for
+mixmaster version 2.04 (beta 45 appears to be the latest) and 2.03.
+It does not support earlier versions or the later so-called version 3 betas,
+of which the latest appears to be called 2.9b23.
To use it, you'll have to obey certain restrictions. Most
important, you cannot use the <tt/Cc/ and <tt/Bcc/ headers. To tell