In the Settings>SSL Certificates>Certificates area you can upload certificates and I believe you should be able to bind it that way so long as a domain/hostname matches the certificate. I have not tested this personally so let me know how it goes!

I’ve tested it somewhat. I think you’ll want to set the password for the .pfx if applicable, and the certificate must be .pfx, before you upload  it. You can also simply copy them to the correct folder. 

Logged in as system admin, Settings-> SSL Certificates

In the options tab, you’ll want to set the pfx password if you’re using one

In the next tab you’ll see your certificate details. If the .pfx is password protected, and you didn’t set that password on the previous tab first, there will be an error and (a couple builds ago) entering the password after the fact didn’t help, but I simply deleted and replaced the certificate file and it worked. I did not investigate further. 

I’m using CTW, and it automatically copies the new certificates .pfx over the old one and it just works. 

Thanks both!

Actually I uploaded a wildcard PFX file (with password).

The internal smartermail webserver does not seems to be working for https

Let me know what log to provide so can trace this further.

Tan, what do you see on the certificates tab of the SSL Certificates settings page? What do you see when you click on that certificate?

@Kyle Kerst, didn't work. can advice where to set the SSL for Linux embedded web server?

@Patrick, no issues with certificate. just that im using wildcard 

@Tan: The certificates are controlled in SmarterMail under Settings>SSL Certificates. There is no direct interaction with SSL bindings possible that I am aware of.