How do I update the SMG's SSL Certificate?

How do I update the SMG's SSL Certificate?

Please follow these instructions to update the SSL/TLS certificate on your SecureMail Gateway:
  1. Login to the web administration at
  2. Click on Certificate -> Upload in the top menu.
  3. Copy/Paste your new certificate in PEM format into the top box. You can also paste the new private key here if you're replacing it. The private key must also be in PEM format and not encrypted.
  4. Copy/Paste your chain certificate(s) in PEM format into the bottom box, one after the other.
  5. Click Submit.
This will replace the SSL certificate used both for HTTPS and SMTP communications by your SMG. It will also restart the necessary services so that the new certificates are used.
If you have multiple (clustered) SMG servers, you will need to upload the new certificates on each node. A different hostname (FQDN) and certificate can be used for each server.

    • Related Articles

    • Routing Mail From Microsoft 365 To Your SMG

      If you are using Microsoft 365 as your mail service, setting up your mail flow to include GlobalCerts SecureMail Gateway(s) is done using a 'Connector' and routing rules. First you need to set up a connector to your SMG. Then, you'll create mail flow ...
    • How do I use an external person's certificate to send them S/MIME secure email?

      If you have external contact that has their own S/MIME certificate for email signatures and encryption, our solutions can very easily capture and use this to send secured emails to them. First, our system will need to capture or 'harvest' their ...
    • How To Import SMG User's S/MIME Certificates into Microsoft Outlook

      Introduction The article describes how to manually trust and use GlobalCerts S/MIME certificates within Microsoft Outlook. It is useful for any 3rd parties that would like to use S/MIME to secure their email with a GlobalCerts user. It assumes you ...
    • End User Training for the SMG

      The attached document contains detailed walkthroughs on how to send and receive secure emails using the SecureMail Gateway solution.
    • SMG Mail Routing for Microsoft Exchange

      If your organization is using Microsoft Exchange for your email server infrastructure, below you will find details on routing your outbound email through the SecureMail Gateway server so that it can secure outgoing emails: ​ Setting up a "Send ...