Man pages matching name svn::hooks::mailer in section 3pm:

SVN::Hooks::Mailer.3pm.en	debian 10 / libsvn-hooks-perl
SVN::Hooks::Mailer.3pm.en	debian 11 / libsvn-hooks-perl
SVN::Hooks::Mailer.3pm.en	debian 12 / libsvn-hooks-perl