Resolve Webmail Error 503

Webmail Error 503

On this web page, we’ll show you how to resolve the webmail error 503 in the mail server MailEnable.

This error indicates that the service you’re looking for is temporarily unavailable. When the error occurs, you would see the following message "https Error 503 Service Unavailable".

Cause:

When the Sysprep tool is run, all user credentials including the IIS user will be removed. This is the main cause of the error. The application pool MailEnableAppPool might have been disabled. To resolve this error, follow the step-by-step instructions given below.

  • Step 1:First, you need to connect to your server or web hosting platform.
  • Step 2:After connecting it, go to the IIS Manager section on your Windows computer and click the Sites.
  • Step 3:Check whether the MailEnable Webmail application pool is running.
  • Step 4:If it is stopped, start it.
  • Step 5:Now, click on the search box and type meinstaller. Double-click meinstaller from the search result to run it.
  • Step 6:Run MailEnable Installer on your computer.
  • Step 7:Select the option that says Web application reconfigure.
  • Step 8:When prompted, enter a random password for your MailEnable account.
  • Step 9:Click the Next button.
  • Step 10:Now, select the Re-Register Administration (MCC) Components option followed by Set .NET Framework version for web applications.
  • Step 11:Click the Apply button.
  • Step 12:Now, restart IIS using the following command: iisreset

The above steps would have fixed the MailEnable account error 503.

Unable To Access MailEnable

If you can't access the MailEnable on Plesk for Windows server, then try the following troubleshooting instructions to resolve it.

  • Step 1:Connect to the server using the remote desktop protocol (RDP).
  • Step 2:Go to the following folder: %SystemDrive%\ParallelsInstaller\parallels\PANEL-WIN_17.5.3\thirdparty-msi-Windows-any-x86_64\
  • Step 3:Select the vcredistXX_x64.msi and vcredistXXX_x64.msi packages and install them.
  • Step 4:Now, go to the Start menu. 
  • Step 5:Select Server Manager > Tools > Internet Information Services (IIS) Manager.
  • Step 6:Choose the MailEnableAppPool application and restart it.
  • Step 7:Now, check if the Webmail error 503 is resolved. If not, contact us.

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