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Zimbra and Renewing SSL Certficate

netserveng asked
Last Modified: 2017-05-10
We are using StartSSL (StartCom) for the ssl certificate. I was able to use the gui in zimbra to generate the csr then request the cert from startcom. I then went back into the certificate wizard on zimbra and installed the new cert. I can see the new cert with the updated dates but still getting error on clients: This CA Root certificate is not trusted because it is not in the Trusted Root Certification Authorities store. Not sure how to continue. Also I work with exchange servers so this zimbra email server is new to me.

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AntzsInfrastructure Services

Can you check if the StartSSL Root Cert is placed correctly in the Trusted Root.
Sanga CollinsSystems Admin

What error message are your clients getting? Also in the zimbra server logs what errors does the server show for the cert. THat will help us trouble shoot.

When every I've installed or renewed certs on zimbra I have always had more success doing it from the command line. I use the free LetsEncrypt certificates and here is the basic steps.

- generate certificate requests

- Copy files to /opt/zimbra/ssl/letsencrypt

- verify cert
  /opt/zimbra/bin/zmcertmgr verifycrt comm privkey.pem cert.pem chain.pem

- make backup of original cert
   cp -a /opt/zimbra/ssl/zimbra /opt/zimbra/ssl/zimbra.$(date "+%Y%m%d")

- make new cert to zimbra ssl store
  cp /opt/zimbra/ssl/letsencrypt/privkey.pem /opt/zimbra/ssl/zimbra/commercial/commercial.key

- deploy cert in zimbra
  /opt/zimbra/bin/zmcertmgr deploycrt comm cert.pem chain.pem

-Restart zimbra services


Thank you for the info. I did some more research and found out that it's StartCom (startssl) that lost the trust to the root. After chatting with them they did verify that the problem is on their end and could take months for them to get trusted again. Looks like I have to get the cert from another company. Thanks again for the info.


Hello Sanga Collins, I'm now looking at going with godaddy for the ssl cert and was wondering if you ever installed a cert from godaddy on a zimbra server ? I only deal with exchange servers so this is all new to me on Zimbra. When I renewed and installed the cert I got from StartCOM I used the GUI Wizard and it worked great and was wondering if I could use it with the godaddy cert. I do know the wizard did ask for the 3 cert files which I got from StartCOM and was wondering if I would get the same thing from godaddy ? Also what server type would I have to chose for the Zimbra server ?

Natty GregIn Theory (IT)

StartSSL had lost their trust with mozilla, safari and google among others and they are working on getting back that trust so their certificate will say untrusted (not a word ) but you get the point. you can still use until they do what the big three ask of them.
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Sanga CollinsSystems Admin

Found the link I saved right away: http://jamesreubenknowles.com/adding-a-godaddy-ssl-certificate-to-zimbra-7-1360

THis was for Zimbra 7 but the concept is the same. A lot of people do have issues when using the gui but it is possible to setup. Once you get more comfortable with zimbra, you should def explore the command line. It is much more powerful (and dangerous :)


Thanks for the help

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