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Applying SSL certificate for securing webmail removes HTTP binding in IIS

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Denis Bykov
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Applicable to:

  • Plesk Onyx for Windows

Symptoms

  • After applying SSL certificate for securing webmail under example.com domain URL http://webmail.example.com is inaccessible (shows Plesk Default Page).
  • 80 port (HTTP binding) is replaced by 443 port (HTTPS binding) in IIS > Sites >MailEnable Webmail > Bindings. 
    1.PNG

Cause

This is expected behavior. HTTP support is intentionally dropped during securing the webmail.
Usability bug with ID #PPPM-6184 is created, which is planned to be fixed in future Plesk updates.

Resolution

To add 80 port for one site follow the steps:

    1. Log in the server using RDP.
    2. Go to Internet Information Services (IIS) Manager > Sites > MailEnable WebMail > Bindings.
    3. Add the corresponding binding record with the webmail.example.com hostname on 80 port.
    4. Restart webmail website in IIS > Sites > MailEnable Webmail > Restart. 

In addition, HTTP to HTTPS redirect rule for Webmail can be created:

  1. Go to IIS > Sites > MailEnable Webmail > URL Rewrite:
  2. Click Add Rule(s) button and select Blank rule.
  3. Fill in as the following:
    mceclip0.png

  4. Add two rules in Conditions section as the following:




  5. Check the result:
  6. Restart webmail website in IIS > Sites > MailEnable Webmail > Restart.

To enable 80 port for all sites, follow the steps: 

    1. Log in the server using RDP.
    2. Start command prompt as Administrator.
    3. Run the following command:

      Warning: the command will drop 443 port for all webmails.

      C:\> "%plesk_cli%\\repair.exe" --reconfigure-webmail-sites 

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