Xavier Maillard <zedek@gnu-rox.org> writes:

> Whenever I sign a message to the ding list and then read, it shows me
> it failed verifying the sign. What it is really weird is that it *ONLY*
> happens in this group but I can easily verify any "self" signed message
> in other groups.

This has been discussed before and is related to the way that the
mailing list software encodes the '---' lines into QP. 

I believe that the answer is to sign using PGP/MIME rather than
inline.