Man pages matching name mhmail in section 1mh:

mhmail.1mh.en	debian 10 / mmh
mhmail.1mh.en	debian 10 / nmh
mhmail.1mh.en	debian 11 / mmh
mhmail.1mh.en	debian 11 / nmh
mhmail.1mh.en	debian 12 / mmh
mhmail.1mh.en	debian 12 / nmh