I am trying to perform manual (and eventually automatic) replication with Centos 5.3 package (2.3.7-2.el5_3.2). Following the suggestions of other posts, I have tested with synctest and imtest. Although both of these work (they connect and authenticate), sync_client always yields: Can not connect to server 'sm1.4test.net', retrying in 15 seconds. The message logged is "imap1 sync_client[25737]: connect(sm1.4test.net) failed: Invalid argument". I've run several commands all with the same result: /usr/lib/cyrus-imapd/sync_client -v -r, /usr/lib/cyrus-imapd/sync_client -r, /usr/lib/cyrus-imapd/sync_client -m user.steve Looking at the replica (sync_server), no packets make it to that box. Looking at the error message there should be some argument of sync_client that is not correct. Here is the sync portion of the imap.conf: sync_host: sm1.4test.net sync_authname: cyrus sync_password: secret sync_log: 1 As there aren't that many options for sync_client, I'm not really sure what's incorrect or missing. Is replication broken in this version? Everything else seems to work perfectly. Steve ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html