[gentoo-user] mutt+gnupg: how do you name the attached signature file ?

[Jean-Christophe Bach]

Hi all,

I am using mutt and gnupg for my mail and I do not understand something:
when I sign and send an email, my gpg signature appears as an attached
"noname" file while friends have an attached "signature.asc" file. How
do you do to change this not so important issue? Is it mutt or gnupg
related?
Have you any idea?                                                                           

Thanks in advance,

JC