Man pages matching name sendemail in section 1:

sendEmail.1.en	debian 10 / sendemail
sendemail.1.en	debian 10 / sendemail
sendEmail.1.en	debian 11 / sendemail
sendemail.1.en	debian 11 / sendemail
sendEmail.1.en	debian 12 / sendemail
sendemail.1.en	debian 12 / sendemail