Applicable to:
- Plesk Onyx for Windows
Symptoms
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After applying SSL certificate for securing webmail under
example.comdomain URLhttp://webmail.example.comis inaccessible (shows Plesk Default Page) or the error below:CONFIG_TEXT: HTTP Error 500.24 - Internal Server Error
Detailed Error Information:
Module ConfigurationValidationModule
Notification BeginRequest
Handler ExtensionlessUrlHandler-Integrated-4.0
Error Code 0x80070032 -
Webmail can be accessed via HTTPS
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Port 80 (HTTP binding) is replaced by 443 port (HTTPS binding) in IIS > Sites >MailEnable Webmail > Bindings.
Cause
This is expected behavior. HTTP support is intentionally dropped during securing the webmail.
It is caused by an usability bug in the product with ID #PPPM-6184, which is planned to be fixed in future Plesk updates.
Note: Consider subscribing to this article to be notified when the bug is resolved
Resolution
To add 80 port for one site follow the steps:
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Log in the server using RDP.
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Go to Internet Information Services (IIS) Manager > Sites > MailEnable WebMail > Bindings.
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Add the corresponding binding record with the webmail.example.com hostname on 80 port.
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Restart webmail website in IIS > Sites > MailEnable Webmail > Restart.
In addition, HTTP to HTTPS redirect rule for Webmail can be created:
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Go to IIS > Sites > MailEnable Webmail > URL Rewrite:
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Click Add Rule(s) button and select Blank rule.
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Fill in as the following:
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Add two rules in Conditions section as the following:
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Check the result:
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Restart webmail website in IIS > Sites > MailEnable Webmail > Restart.
To enable 80 port for all sites, follow the steps:
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Log in the server using RDP.
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Start command prompt as Administrator.
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Run the following command:
Warning: the command will drop 443 port for all webmails.
C:\> "%plesk_cli%\\repair.exe" --reconfigure-webmail-sites
Comments
3 comments
Unfortunately it did not work. This forces access with HTTPS for all webmails, even for non-HTTPS clients.
It would be nice to have a rule to redirect to HTTPS only if the client installed an SSL certificate in webmail.
@Jefferson André Voigt
Could you please clarify what exactly did not work?
As for a rule to redirect to HTTPS only if the client installed an SSL certificate in webmail, please vote for the feature on Plesk User Voice portal:
https://plesk.uservoice.com/forums/184549-feature-suggestions/suggestions/31900489-redirect-from-http-to-https-for-secured-webmails
Top-ranked suggestions are likely to be implemented in future Plesk releases
Ideally, you should only redirect requests to HTTPS if the client has SSL certificate installed. Voted! Thank you.
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