Man pages matching name mailsound in section 1:

Mailsound.1.en	debian 10 / rplay-contrib
mailsound.1.en	debian 10 / rplay-contrib
Mailsound.1.en	debian 11 / rplay-contrib
mailsound.1.en	debian 11 / rplay-contrib
Mailsound.1.en	debian 12 / rplay-contrib
mailsound.1.en	debian 12 / rplay-contrib