Website or webmail does not work: Error 503. The service is unavailable

Created:

2016-11-16 13:24:27 UTC

Modified:

2017-08-18 17:39:08 UTC

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Website or webmail does not work: Error 503. The service is unavailable

Applicable to:

  • Plesk for Windows

Symptoms

Website example.com shows the error in browser:

HTTP Error 503. The service is unavailable.

Cause

Application pool is stopped.

Resolution

  1. Determine the application pool that is used by website via Windows Powershell:

    Get-Item "%plesk_vhosts%\\example.com"| Select-Object applicationPool
    applicationPool
    ---------------
    example.com(domain)(4.0)(pool)
  2. Start application pool by opening Internet Information Services (IIS) Manager > Application pools > choose application pool > Start .

Additional information

MailEnable webmail shows HTTP Error 503 or The service is unavailable: username or password was entered incorrectly

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