Man pages matching name mail::milter::wrapper::defertorcpt in section 3pm:

Mail::Milter::Wrapper::DeferToRCPT.3pm.en	debian 10 / libmail-milter-perl
Mail::Milter::Wrapper::DeferToRCPT.3pm.en	debian 11 / libmail-milter-perl
Mail::Milter::Wrapper::DeferToRCPT.3pm.en	debian 12 / libmail-milter-perl