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Sendmail and Cyrus IMAP integration
-----------------------------------

Based on feature "mrs" and patches from Andrzej Filip <anfi@priv.onet.pl>
http://anfi.homeunix.org/sendmail/
http://open-sendmail.sourceforge.net/

I. Cyrus IMAP's configuration
-----------------------------
1. Check section SERVICES of cyrus.conf for enable smmapd support. 
   It's possible for Cyrus IMAP v2.2.2 or more recent.

For example:
  smmapd        cmd="smmapd" listen="smmapd" prefork=5
or
  smmapd        cmd="smmapd" listen="/var/imap/socket/smmapd" prefork=1

2. If you want use lmtp via tcp you can add "-a" option to lmtp call.  
For example:
  lmtp          cmd="lmtpd -a" listen="lmtp" prefork=5

!!! Be sure what only valid senders can use lmtp connestions. You can
!!! disable access to lmtp for all and enable for valid senders by
!!! iptables. Otherwise without "-a" option you must use SMTP AUTH
!!! mechanism for Sendmail.

3. Check /etc/services for lmtp and smmapd definition.

II. Sendmail's configuration exampes.
-------------------------------------

1. Local users hadled by Cyrus-IMAP (unix socket)

Configuration example: /usr/share/sendmail-cf/cf/cyrus-imap-localrelay.mc

2. Cyrus's virtual domain and mailertable (tcp socket).

Configuration example: /usr/share/sendmail-cf/cf/cyrus-imap-mailertable.mc

Local domains hendled by Cyrus must be removed from /etc/mail/local-host-names
and put to /etc/mail/access and /etc/mail/mailertable:

assess:
to:example.dom		RELAY

mailertable:
example.dom		mrs_cyrus_mailertable:error:5.1.1:550 User unknown

unix and tcp sockets definition examples:

FEATURE(`mrs_cyrus',`smmapd@localhost',`inet')dnl
FEATURE(`mrs_cyrus',`/var/lib/imap/socket/smmapd',`local')dnl
define(`CYRUSV2_MAILER_ARGS',`TCP localhost lmtp')dnl
define(`CYRUSV2_MAILER_ARGS',`FILE /var/lib/imap/socket/lmtp')dnl

Note 1: You must check lmtpunix socket in /etc/cyrus.conf. Default for Postfix.

--
For more information you can access to Andrzej Filip's RTCyrus home page:
http://anfi.homeunix.net/sendmail/rtcyrus2.html
http://anfi.webhop.net/sendmail/rtcyrus2.html