How to create a permanent redirect for MailEnable webmail from HTTP to HTTPS on a Plesk Windows server?

Question

How to create a permanent redirect for MailEnable webmail from HTTP to HTTPS on a Plesk Windows server?

Answer

Note: starting from Plesk Obsidian the HTTPS redirection for webmail is enabled by default.

1. Log into the server via RDP.

2. Go to Start > Windows System > Administrative Tools > Internet Information Services (IIS) Manager > ServerName > Sites > MailEnable WebMail.

3. Press the Bindings button on the left panel:
   Click on the screenshot below to expand

   

   Note: in the steps №4 and №8 replace example.com with the name of the required domain.

4. In the appeared window press the Add button and set the following settings:

   • Type: http
   • IP address: All Unassigned
   • Port: 80
   • Hostname: webmail.example.com

5. Press the OK and then Close buttons.

6. Press the Explore button in the Actions section:
   

7. In the appeared file explorer window, create a backup for the web.config file.

8. Open the web.config file using any text editor and paste the code below after the <system.webServer> section:

   CONFIG_TEXT: <rewrite>
   <rules>
   <rule name="Redirect to HTTPS" enabled="true" stopProcessing="true">
   <match url="(.*)" />
   <conditions>
   <add input="{HTTPS}" pattern="off" />
   <add input="{HTTP_HOST}" pattern="(webmail)\.example\.com" />
   </conditions>
   <action type="Redirect" url="https://{C:0}/{R:0}" redirectType="Permanent"/>
   </rule>
   </rules>
   </rewrite>

9. Back to Internet Information Services (IIS) Manager > ServerName > Sites > MailEnable WebMail and press the Restart button in the Manage Website section to apply the changes: