Sending HTML mail from mail

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Autor: Bryce C
Data:  
Assunto: Sending HTML mail from mail
Could some please tell me how I can set headers (including Mime-Type)
when sending mail from the command line with mail?

Thanks,
--
Bryce Chidester
Network Administrator
CoBryce Communications
Bryce AT BryceCo DOT Net
http://www.bryceco.net