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Zimbra: Install a Comodo SSL Certificate

1. Get the bundle from Comodo in crt format, or sometimes like a zip file. You can also login to https://cert-manager.com/customer/eI4Africa and download the X.509 Root/Intermediate(s) bundle. 2.  Copy the downloaded bundle to the mail server under /tmp. The bundle contains the following files: AddTrustExternalCARoot.crt COMODORSAAddTrustCA.crt COMODORSADomainValidationSecureServerCA.crt

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