about 'mutt' attachment filename encoding

[YuHong]

hi, firends:
	
	it's seen 'mutt' use the encoding specified in RFC2231 while send mail
include attachment like this: 

	filename*=gb2312''%D6%D0%CE%C4%2Etxt

	but 'outlook' and any other email programs use the encoding specified in
RFC2047 like this:
	
	filename="=?iso-8859-1?Q?file=5F=E4=5F991116=2Ezip?="

	'outlook' decoding email attachment name is incorrect send by mutt, how to
solve this problem? (how to send mail include attachment use mutt to make
'outlook' could decoding it correct?)

	(mutt version 1.5.8i)

	thanks for your help, have a good day!

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