MailEnable webmail is not accessible: Error 500.0 - Internal Server Error

Created:

2016-12-12 03:40:33 UTC

Modified:

2017-08-08 13:22:10 UTC

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MailEnable webmail is not accessible: Error 500.0 - Internal Server Error

Applicable to:

  • Plesk 12.5 for Windows

Symptoms

  1. MailEnable webmail is not accessible:

    HTTP Error 500.0 - Internal Server Error
    Calling LoadLibraryEx on ISAPI filter "C:\\Windows\\Microsoft.NET\\Framework\\v4.0.30319\\\\aspnet_filter.dll" failed
  2. The library aspnet_filter.dll exists on the server.

Cause

There is an extra "\" in path to the library in ISAPI filter settings in IIS.

Resolution

  1. Open IIS Manager snap-in
  2. Go to Sites > MailEnable WebMail > ISAPI Filters and check that there is no extra "\" in the path to aspnet_filter.dll
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