Trying to plan a migration from qmail-ldap to Zimba. I have followed the various topics in the forums in relation to qmqp but have now hit a brick wall when trying to send messages. Here is the scenario.

The qmail-ldap server (qmail.mydomain.com) is the MTA for mydomain.com and has ldapclustering configured and working correctly. The Zimbra server (zimbra.mydomain.com) has the following in main.cf :-

qmqpd_authorized_clients = 192.168.0.0/24
qmqpd_error_delay = 1s
qmqpd_timeout = 300s
qmqpd_client_port_logging = yes


and the following line added in master.cf :-

628 inet n - n - - qmqpd

I change the 'mailhost' ldap entry for user2@mydomain.com from qmail.mydomain.com to zimbra.mydomain.com. I then send a message from user1@mydomain.com to the migrated user2@mydomain.com.

From /var/log/zimbra.log I see:-

Nov 17 11:37:55 Zimbra postfix/qmqpd[1225]: 4359D3804DB: unknown[192.168.0.24]:48214: netstring format error while receiving QMQP packet header

The message is returned to user1@mydomain.com with the following error:-

Unable to cluster-forward message: mail server permanently rejected message (#5.3.0).

I am thinking maybe a problem with Postfix, but I cannot progress any further. Any help would be greatly appreciated.

Phil