Stephen Liu wrote:

I'm searching software from Open Source to archive emails in the form of plain test similar to following URL

http://www.linuxquestions.org/questions/archive/13/2002/01/4/13013

Can Mailman do the job or it just links all emails of same subject as a thread.

Mailman's built-in archiver is Pipermail which does not do threads like your example. Also, it links threads based on In-Reply-To: and/or References: headers, not by Subject:

Mailman has hooks for external archivers.

-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan