Man pages matching name log::dispatch::email::mailsender in section 3pm:

Log::Dispatch::Email::MailSender.3pm.en	debian 10 / liblog-dispatch-perl
Log::Dispatch::Email::MailSender.3pm.en	debian 11 / liblog-dispatch-perl
Log::Dispatch::Email::MailSender.3pm.en	debian 12 / liblog-dispatch-perl