Man pages matching name email::mime::kit::assembler::standard in section 3pm:

Email::MIME::Kit::Assembler::Standard.3pm.en	debian 10 / libemail-mime-kit-perl
Email::MIME::Kit::Assembler::Standard.3pm.en	debian 11 / libemail-mime-kit-perl
Email::MIME::Kit::Assembler::Standard.3pm.en	debian 12 / libemail-mime-kit-perl