Article ID: 118889, created on May 4, 2014, last review on Aug 12, 2014

  • Applies to:
  • Plesk 11.5 for Windows

Symptoms

Can not enable/disable mail service on subscription with error:

Failed to connect to database: Unknown MySQL Server Host 'localhost' (11001)

Cause

Horde configuration after upgrade is incorrect.

Resolution

In file %plesk_vhosts%webmail\horde\config\conf.php

change string

$conf['sql']['hostspec'] = 'localhost';

to

$conf['sql']['hostspec'] = "localhost";

In case if the above solution doesn't help, please use the following article: http://kb.sp.parallels.com/1356

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