SSH into your zimbra server. Change to zimbra server: su – zimbra Now type: /opt/zimbra/bin/zmmailbox -z -m [email protected] getRestURL “//?fmt=tgz” > /tmp/temp.tgz && /opt/zimbra/bin/zmmailbox -z -m [email protected] postRestURL “//?fmt=tgz&resolve=modify” /tmp/temp.tgz Make sure you replace [email protected] and [email protected] with proper addresses. If the old mailbox is big you may encounter the following error: ERROR: zclient.IO_ERROR (Read […]
The following guide is tested against zimbra 8.8: Installing a Let’s Encrypt SSL Certificate If this error occurs: ‘Unable to start TLS: hostname verification failed when connecting to ldap master.‘ make sure you have included your hostname in your letsencrypt signing domains and follow the guide once again. For instance, if your hostname is mail5.example.com, […]
Just type the following: su – zimbra /opt/zimbra/libexec/zmdkimkeyutil -a -d example.com Then add the output to a txt record in your dns config. Check your configuration using this link: https://mxtoolbox.com/dkim.aspx
Guide for installing zimbra on ubuntu 16.04. If you use clouldflare or another dns service provider you can skip bind part. How to Setup Zimbra Mail Server on Ubuntu 16
Guide below is tested against zimbra 8.6, 8.7, 8.8. It’s not a full zimbra to zimbra migration, missed some things, but it works to migrating most important stuff. There might also exist some minor bugs, but if you have a basic experience in linux shell you won’t have a problem tweaking commands. Zimbra Server Migration […]
Zimbra uses memcached and if not properly configured could lead to a vulnerable system. If you want to read more on memcached attack read this: https://blog.cloudflare.com/memcrashed-major-amplification-attacks-from-port-11211/ How to resolve this vulnerability in 3 steps: Enable firewall on your server Setup zimbra specific rules Bind memcached to localhost Deny memcached port from localhost Let’s start.
Ahmad Imanudin has a nice series of tutorials on installing and configuring policyd on Zimbra. Install and enable web ui. How To Install PolicyD on Zimbra 8.5 2. Password protect web ui with .htaccess Zimbra Tips: How To Protect Policyd WebUI 3. Configure policyd using web ui Zimbra Tips : How To Configure Rate Limit […]