Category: ZIMBRA

Tips on how to Install/configure Zimbra Mail system


LibClamAV Error: mpool_malloc(): Attempt to allocate 8388608 bytes

Lately I updated the Ubuntu 12.04 where I run Zimbra 8.x and found that the log file of ‘clamd’ process was filling incredibly fast with the follwoing error line and the emails received’s subject were tagged with ‘**UNCHECKED**’ LibClamAV Error: mpool_malloc(): Attempt to allocate 8388608 bytes. Please report to Finally I found a solution …


Some useful commands for Zimbra

Show the expiry date of the installed certificate: Run as root user: /opt/zimbra/bin/zmcertmgr viewdeployedcrt all |grep notAfter Restart all the Zimbra services Run as zimbra user: zmcontrol stop ; zmcontrol start Check the status of all running Zimbra services: Run as zimbra user: zmcontrol status Display the version of the current Zimbra: Run as zimbra …


Configuring Zimbra to deliver mail using SSL/TLS

Reference: ssh su – zimbra zmlocalconfig -e postfix_smtp_tls_security_level=may zmcontrol restart Sent an email to normal postfix server: Check the headers of received email: Received: from ( []) by (Postfix) with ESMTPS id E457F3E09E for ; Fri, 19 Apr 2013 23:35:31 +0200 (CEST) Sent to GMAIL server: Received: from ( []) …


Install Geotrust certificate in Zimbra 8.x

The best way to install a RapidSSL cert is via the CLI as the root user. Reference: (18-12-2012 @ 23:39 BST) 1. Start by logging into your Zimbra servers CLI via SSH. 2. As root begin by generating a Certificate Signing Request (CSR). Below replace ‘’ with the FQDN of your Zimbra server. /opt/zimbra/bin/zmcertmgr …


Configuring DKIM Authentication in Zimbra

Configuring Zimbra 8.x to use DKIM Authentication Example for ‘’ ssh su – zimbra Creating the DKIM keys for a domain: /opt/zimbra/libexec/zmdkimkeyutil -a -d Example of result: 50F0EEFE-AB8C-11E2-B7AE-FC2CE654A0ED._domainkey IN TXT ( “v=DKIM1; k=rsa; ” “p=MIGfMA0GCSqGSIb3DQEBAQUCA4GNADCBiQKBgQDodIcoFWJsfsSzsdINY/ZiOKn3qKLt+qmEl1cDYApi0PCHwQmqTl9mhRKs3obfgN8O9nT227CDg9NI7MMu8r0fOatQRQ1YHesDmHIo1lELioDNd5QZPg1AUum0CPsDuR+YI5AG5wZhZ4c3ei0Uv3cu4aTIhGrRgnD081sysJ5vZwIDAQAB” ) ; —– DKIM key 50F0EEFE-AB8C-11E2-B7AE-FC2CE654A0ED for IMPORTANT: Enter the above result as TXT field in the …