!!!!WARNING!!!! Hypermail 2.x Upgrade Notes Hypermail 2.x HTML output files, indexes, etc are not compatible with 1.x files. When installing 2.x, all existing HTML files in the specified output directory must be removed first. Use the original 1.x mailbox files to regenerate the new 2.x archive. If the mailboxes are not available it should be possible to use the script hypetombox.pl in the contrib/ directory.