Maintainers for emacs21 are Rob Browning <rlb@defaultvalue.org>.
You may want to refer to the following packages that are part of the same source: emacs, emacs-bin-common, emacs-common, emacs-el, emacs-gtk, emacs-lucid, emacs-nox, emacs-pgtk, emacs21-nox, emacs22, emacs22-gtk, emacs22-nox, emacs23, emacs23-lucid, emacs23-nox, emacs24, emacs24-lucid, emacs24-nox, emacs25, emacs25-lucid, emacs25-nox.
You might like to refer to the emacs21 package page, to the Package Tracking System, or to the source package src:emacs's bug page.
If you find a bug not listed here, please report it.