net-mail/dovecot-2.0* and net-mail/dovecot-2.1* version are masked (and are about to be removed from the tree) because of security bug #492494 Please have mail-filter/dovecot_deleted_to_trash work with net-mail/dovecot-2.2 or punt the package. Thank you.
+ 18 Feb 2014; Patrick Lauer <patrick@gentoo.org> package.mask: + Append mail-filter/dovecot_deleted_to_trash to dovecot mask + Since all valid dovecot versions are masked
The dovecot 2.2 compatibility patch has been merged, still backwards compatible with 2.1. https://github.com/lexbrugman/dovecot_deleted_to_trash
We will fix this in bug #507716 *** This bug has been marked as a duplicate of bug 507716 ***