How To Configure and Validate DKIM Records on Zimbra

DKIM is one of many tips for increase reputation of email server besides SPF records who has been explained on previous article. On this section, i will do generate DKIM on Zimbra and configure DKIM records on public DNS using cPanel.

First, login to Zimbra server via SSH and generate DKIM
su - zimbra
/opt/zimbra/libexec/zmdkimkeyutil -a -d imanudin.net -s selector



The result of above command is like below

For records key DKIM is line on () starting with “v=DKIM1…..until double quote (“). Block and copy the records and check on website : http://dkimcore.org/tools/. Paste on key record for checking and validate.

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Installing a Comodo SSL Certificate on Zimbra Collaboration

Installing a Comodo SSL Certificate

Use the article as a guide to installing a Comodo issued SSL certificate with the zmcertmgr tool or the Admin Console.

Using the CLI

• 1. Get the bundle from Comodo in crt format, or sometimes like a zip file. Is always good call or write Comodo and obtain the proper Bundle, but you can also download each file from the next URL (SHA2 files) - https://support.comodo.com/index.php?/Default/Knowledgebase/Article/View/620/1/
• 2. Place the bundle on your Zimbra mailbox server. You should receive, or download, the next files:
  • AddTrustExternalCARoot.crt
  • COMODORSAAddTrustCA.crt
  • COMODORSADomainValidationSecureServerCA.crt
  • my_domain_com.crt files

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