Local mail delivery problem
If you don't want to configure split dns, you can use this. By default postfix performs a lookup against dns for a local (lmtp) delivery. If want to avoid configuring split dns, you can set postfix_lmtp_host_lookup to native mode. Then postfix will lookup in /etc/hosts file to deliver a local email rather than doing a dns query.
su - zimbra zmlocalconfig -e postfix_lmtp_host_lookup=native
You may need to restart zmcontrol to update the setting.
Note: This will work only on postfix 2.3 or later.
Self Signed Certificate
Simple five steps to re-deploy the self signed certificate via command line. Run as ROOT.
/opt/zimbra/bin/zmcertmgr createca /opt/zimbra/bin/zmcertmgr deployca /opt/zimbra/bin/zmcertmgr deploycrt self
If you have ZCS older than 5.0.6, then use following command to deploy the certificate.
/opt/zimbra/bin/zmcertmgr install self -new
Restart the zmcontrol.
su - zimbra zmcontrol stop zmcontrol start
Using zimbra server only as a Store with a non-zimbra MTA
Delivering emails from an non-zimbra postfix server to Zimbra on lmtp (7025) port. This is an example for domain abc.com. Zimbra server address is server.zimbra.com
1. Make sure mx for abc.com pointed to postfix sever. And it can receive emails for abc.com 2. Create abc.com domain in zimbra. 3. Add "mailbox_transport" parameter to main.cf to deliver emails to zimbra server.
mailbox_transport = lmtp:<zimbra_hostname>:7025
Save and reload postfix.
Important: User account must be created on zimbra server whom mails are sent.
That should be enough to deliver all emails to zimbra server.
Holding the Postfix Queue at time of server migration/maintenance
Holding the postfix queue at the time of migration. Specifically at the time when you need mailboxd to be running so that imapsync can inject emails.
Hold the queue:
postsuper -h ALL
Release the hold queue:
postsuper -r ALL
To delete the mails from the queue:
'cat /tmp/deletelist | /opt/zimbra/postfix/sbin/postsuper -d -'
- Other way it to create a file and define the user's whose emails you want to hold.
1.Create a stub file called /opt/zimbra/conf/migration-hold that will be used by Postfix to HOLD messages and then "postmap" this file to create the .db hash file.
2. Modify /opt/zimbra/conf/postfix_recipient_restrictions.cf to include the line in bold below.
reject_non_fqdn_recipient permit_sasl_authenticated permit_mynetworks reject_unlisted_recipient check_recipient_access hash:/opt/zimbra/conf/migration-hold permit
3. Execute "postfix reload" as the zimbra user. main.cf will now reference the new migration-hold file
4. The migration-hold file will contain the full list of email addresses that will be migrated during the impending migration in the following format:
firstname.lastname@example.org HOLD migration in progress email@example.com HOLD migration in progress
Now the MTA will accept the message, but place it in the HOLD queue as shown below:
postfix/smtpd: NOQUEUE: hold: RCPT from unknown[xx.xx.xx.xx]: <sender@domain>: Recipient address migration in progress; from=<firstname.lastname@example.org> to=<recepient@domain>
5. Finally, the "postsuper -H ALL" command should be executed on each Zimbra MTA to allow all held mail to be moved back into the active queue for delivery.
6. After migration has been completed, all empty migration-hold file will be removed and postfix_recipient_restrictions.cf will have the check_recipient_access line deleted.
Manually Copying ldap data from Master to Replica
After converting the master ldap server to be a replica from the wiki http://wiki.zimbra.com/index.php?title=Promoting_Replica_to_LDAP_Master the replica server may take time to sync entire ldap data from the master server. These steps will guide you to manually copy the data from master server to the replica server. This is also useful if you have huge amount of ldap data on master and don't wish to sync the entire data through the network.
Steps to followed on the Master server:
1. Create a backup directory and take a dump of ldap data.
mkdir /backup chown zimbra:zimbra /backup /opt/zimbra/libexec/zmslapcat /backup
Steps to follow on the Replica server:
1. Create a directory on replica server and copy the ldap dump in it.
mkdir /backup chown zimbra:zimbra /backup Copy the ldap.bak from the master server's /backup directory and place it in /backup directory of this server.
2. Removing and recreating the openldap data.
cp /opt/zimbra/openldap-data/DB_CONFIG /tmp rm -rf /opt/zimbra/openldap-data/* cp /tmp/DB_CONFIG /opt/zimbra/openldap-data/ mkdir -p /opt/zimbra/openldap-data/logs /opt/zimbra/openldap-data/accesslog/db /opt/zimbra/openldap-data/accesslog/logs chown -R zimbra:zimbra /opt/zimbra/openldap-data
3. Restoring the ldap data.
/opt/zimbra/openldap/sbin/slapadd -q -b "" -f /opt/zimbra/conf/slapd.conf -cv -l /backup/ldap.bak
You may need to restart zmcontrol on the replica. Also make sure if replica is syncing with the master server by looking at /var/log/zimbra.log file.
Replacing organiser of a meeting
1. zmmailbox -z -m email@example.com gru /Calendar > /tmp/resourceA.ics
2. modify resourceA.ics (i.e. change the organizer from user to the new person) and rename it to, say, resourceA_updated.ics
3. zmmailbox -z -m resourceA@laika.com pru /Calendar /tmp/resourceA_updated.ics