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How can I configure PROTOCOL BINDINGS in Linux SmarterMail to use Let's Encrypt's automatic SSL certificate?
Question asked by Gabriele Maoret - SERSIS - 4/4/2025 at 3:35 AM
Answered
I just installed a NEW SmarterMail server on Linux with a single domain and configured it to use HTTPS and Let's Encrypt automatic certificates from SmarterMail Settings --> SSL Certificates

All is working well...

But now I'm having trouble configuring IMAP, POP3 and other TLS/SSL bindings in SmarterMail Settings --> Bindings --> Ports...

I expected this step to be automatic (since certificates are handled automatically...) but it isn't and I can't figure out how to configure them and can't even find an article in the KB or online manual that explains it...

Can you help me?
Gabriele Maoret - Head of SysAdmins and CISO at SERSIS
Currently manages 6 SmarterMail installations (1 in the cloud for SERSIS which provides services to a few hundred third-party email domains + 5 on-premise for customers who prefer to have their mail server in-house)

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Can anyone give me some advice on this?
Gabriele Maoret - Head of SysAdmins and CISO at SERSIS Currently manages 6 SmarterMail installations (1 in the cloud for SERSIS which provides services to a few hundred third-party email domains + 5 on-premise for customers who prefer to have their mail server in-house)
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Kyle Kerst Replied
4/7/2025 at 4:47 PM
Employee Post Marked As Answer
Hi Gabriele! To finish this up you just need to add SSL/TLS backed ports in Settings>Bindings>Ports for port 993, 465, etc. For the certificate selection you're going to choose one of the PFX files generated as part of the certificate setup. I usually use the one associated with the Hostname field in Settings>General. The PFX file you select in those port definitions will be your fall-back certificate, so will be the one used if there isn't a better matched certificate present on disk already. 
Kyle Kerst Acting IT Manager SmarterTools Inc. www.smartertools.com
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Hi Kyle!
Thanks for your answer!

But I miss some details:
  1. Where can I find these PFX files on Linux (what's the path)?
  2. Can I use them without password? If not, where can I find the correct password?

I think this is a task that can be automated more, for example:
- give the possibility to choose from a list of existing certificates among those automatically created
- give the possibility to automatically create a specific certificate (always via Let's Encrypt)

Or, at least, you should write a step by step guide, because, unfortunately, all the current guides refer to the Windows version for this step and there are no instructions for Linux anywhere...
Gabriele Maoret - Head of SysAdmins and CISO at SERSIS Currently manages 6 SmarterMail installations (1 in the cloud for SERSIS which provides services to a few hundred third-party email domains + 5 on-premise for customers who prefer to have their mail server in-house)
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