General deployment notes

Leave the default COS unchanged. Create new custom COS by cloning the default and change settings.

At the domain config, set Default Class of Service to the custom made COS.

Set the default time zone for users at:

• Domain » my domain »General information
• Class of Service » my COS » preferences » Calendar Options

If using a seed image with private hostname (zimbra.local), add this to /opt/zimbra/postfix-2.7.5.2z/conf/main.cf:

smtp_helo_name=realhost.realdomain.com

Then restart mta:

su - zimbra
zmmtactl restart

This method makes local mail from cron or shell fail with error “mail for realhost.realdomain.com loops back to myself”

Run this to set greetings to resolvable hostname:

su - zimbra
zmprov mcf zimbraMtaMyHostname realhost.realdomain.com
zmmtactl restart

• http://www.zimbra.com/forums/installation/17754-solved-howto-change-postfix-helo.html#post90561
• http://bugzilla.zimbra.com/show_bug.cgi?id=17794

Regenerate a ssl certificate for the public hostname.

Login admin web UI » Certificates » Install Cert » Install Self Sign » Fill in » Finish » Restart Zimbra

• Login admin web UI » Global Settings » MTA » unCheck TLS authentication only
• Login admin web UI » Global Settings » IMAP» check Enable clear text login
• Login admin web UI » Global Settings » POP» check Enable clear text login

• Login admin web UI » Server Settings » MTA » unCheck TLS authentication only
• Login admin web UI » Server Settings » IMAP » check Enable clear text login
• Login admin web UI » Server Settings » POP » check Enable clear text login

Login admin web UI » Global Settings » MTA » Maximum message size

Login admin web UI » Global Settings » MTA » DNS Checks » Enable:

• reject_unknown_hostname
• reject_unknown_sender_domain

Add RBL:

• zen.spamhaus.org
• bl.spamcop.net

Prepare a whitelist for RBL: Whitelist IP addresses when using RBL

Relocate the message and index store for easier backup/restore management.

Go to Server settings » Volumes » Manage Volumes, add:

• IndexVol1 at /zdata/index for index
• MessageVol1 at /zdata/store for message

In Assign Current Volume section, set the current message and index volume to the newly added volumes.