I intend to orphan the mailnag package.

Prospective maintainers should also consider adopting gnome-shell-mailnag.

The package description is:
 Mailnag is a daemon program that checks POP3 and IMAP servers for new mail.
 On mail arrival it performs various actions provided by plugins. Mailnag
 comes with a set of desktop-independent default plugins for visual/sound
 notifications, script execution etc. and can be extended with additional
 plugins easily