extracting subjects lines

[Ulrich Lauther]

Hi,

I use
        grep "Subject: " /var/mail/$USER 

to extract subject-lines from my mail box and get for instance

        Subject: =?utf-8?Q?Achtung=20=2D=20don=27t=20say=20that?=

but in mutt, I see
        
        Achtung - don't say that

How can I get the subject lines in clear text?

(iconv does not help, as the utf-8 caharacters are already transcribed to 
ascii sequences, e.g. "'" to "=27")

Thanks,

  ulrich