Packages with the maildir use flag

Global definition: Add support for maildir (~/.maildir) style mail spools.

app-shells / zsh : UNIX Shell similar to the Korn shell

mail-mta / exim : A highly configurable, drop-in replacement for sendmail

net-mail / popa3d : A security oriented POP3 server

net-mail / tpop3d : An extensible POP3 server with vmail-sql/MySQL support