[opendmarc-users] unprotected key

[Benny Pedersen]

Authentication-Results: medusa.blackops.org;
	dkim=fail reason="signature verification failed" (1024-bit key; 
unprotected) header.d=junc.eu header.i=@junc.eu header.b=1DCPRjxe;
	dkim-atps=neutral

why does it fail here ?