Man pages matching name email::foldertype::maildir in section 3pm:

Email::FolderType::Maildir.3pm.en	debian 10 / libemail-foldertype-perl
Email::FolderType::Maildir.3pm.en	debian 11 / libemail-foldertype-perl
Email::FolderType::Maildir.3pm.en	debian 12 / libemail-foldertype-perl