This package is part of the Pigeonhole project
(http://pigeonhole.dovecot.org). It adds support for the Sieve language
(RFC 5228) and the ManageSieve protocol (RFC 5804) to the Dovecot Secure
IMAP Server. In the literal sense, a pigeonhole is a a hole or recess
inside a dovecot for pigeons to nest in. It is, however, also the name
for one of a series of small, open compartments in a cabinet used for
filing or sorting mail. As a verb, it describes the act of putting an
item into one of those pigeonholes. The name `Pigeonhole' therefore well
describes an important part of the functionality that this project adds
to Dovecot: sorting and filing e-mail messages.

This package provides Sieve support as a plugin to Dovecot's Local
Delivery Agent (LDA) and Dovecot's LMTP service. The ManageSieve
protocol is provided is an additional service, next to Dovecot's own
POP3 and IMAP services.

1. build dependencies:
   1. dovecot-devel = 2.2.21