Fix: Unable to start TLS: SSL connect attempt failed error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed when connecting to ldap master.Cannot determine services – exiting Rumi, September 1, 2018 My ZImbra 8.6 was throwing the following error once after my letsencrypt SSL got expired: Unable to start TLS: SSL connect attempt failed error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed when connecting to ldap master.Cannot determine services – exiting The Fix: In order to fix the problem you need to modify the following… Continue Reading
Zimbra Letsencrypt SSL Renew – Zimbra 8.6 Rumi, September 1, 2018 Let’s Begin: This works if you already have an expired letsencrypt ssl certificate and assuming you have already deployed SSL in you zimbra system. However, if you come up here already, and would like to know how to setup letsencrypt on your system you may read my other article here:… Continue Reading
Zimbra – deleting all email in queue by sender Rumi, August 17, 2018January 15, 2022 As root user execute: /opt/zimbra/postfix/sbin/postqueue -p | tail -n +2 | awk ‘BEGIN { RS = “” } / sender@mail\.com/ { print $1 }’ | tr -d ‘*’ | /opt/zimbra/postfix/sbin/postsuper -d – To Delete ALL Messages From Queue /opt/zimbra/postfix/sbin/postsuper -d ALL or /opt/zimbra/common/sbin/postsupe -d ALL Another way to do this:… Continue Reading
Installing Let’s Encrypt on a Zimbra Server Rumi, June 15, 2018June 15, 2018 Let’s Encrypt must be installed on one Linux machine to obtain the proper SSL Certificate, CA Intermediate, and Private Key. It is not required that it be on the same Zimbra Server, but it could save time and help to obtain the renewals, etc. First Step is to stop the… Continue Reading
Zimbra send http traffic to https or keeping both in mix Rumi, June 10, 2018June 10, 2018 HTTP proxy can support protocol modes for HTTP or HTTPS only, both HTTP and HTTPS, mixed HTTP and HTTPS or HTTPS redirect from HTTP. Redirect is a popular configuration. This configuration must be made to the proxy servers. HTTPS redirect from HTTP zmprov ms proxy.server.name zimbraReverseProxyMailMode redirect HTTP and HTTPS… Continue Reading
Increase mail attachment in Zimbra 8.8 Rumi, June 3, 2018 Postfix configuration (zimbraMtaMaxMessageSize and message_size_limit) You can examine the current value of this parameter like this: # su – zimbra $ postconf message_size_limit message_size_limit = 10240000 This configuration parameter is stored in the zimbra ldap directory, and propagated to postconf’s message_size_limit by zmmtaconfig, which is invoked by the zimbra postfix… Continue Reading
Zimbra Exporting all mail addresses Rumi, April 26, 2018April 26, 2018 Exporting all addresses (mailboxes, aliases and distribution lists) is a vital tool if you have a backup MX and only want it to accept email for valid recipients. One reason for that is to stop spammers who simply use a dictionary of common names to generate recipient email addresses which… Continue Reading
Best Practices on Email Protection: SPF, DKIM and DMARC Rumi, August 20, 2017 Once we installed Zimbra Collaboration, we need to be aware of some additional configurations that will allow us to send emails to other Email systems with an improve Security, such Gmail, Hotmail, Yahoo!, etc. This Wiki article will show the different Email Protection resources that exists, depends of the volume… Continue Reading
Zimbra Domain Administration (Multi-tenant) Rumi, June 4, 2015 In order to create a multi tenancy in zimbra OSA, can be acheived through a bash script below. Thanks to Ahmad Imanuddin (http://www.imanudin.com) for sharing this very useful script. cd /srv/ vi admin-delegate.sh Fill with the following line : Continue Reading
Zimbra Increasing Attachment Size works for 8.5 Rumi, June 4, 2015 Through zimbraGUI didn’t find it how to do it, but through console it appeared to be working with the following set of commands to modify postfix actually- su zimbra zmprov mcf zimbraMtaMaxMessageSize 20971520 zmprov mcf zimbraFileUploadMaxSize 20971520 zmprov mcf zimbraMailContentMaxSize 52428800 zmprov modifyConfig zimbraMtaMaxMessageSize 52428800 postfix reload Once theyre executed,… Continue Reading