Description of problem:
mutt ships own ca-bundle.crt file in the /usr/share/doc/mutt-<version>. According to the "Last Modified" date in the file, it has not been updated since 2000. It's docs only, but as it's getting quite venerable (lot of certs are expired, other needed today are most likely missing), it should be removed or replaced with a symlink to ca-certificate's one, if it's really needed.
ca-bundle.crt has been removed in Rawhide as of mutt-1.5.21-8.