- Plesk for Windows
Horde webmail with more than 100.000 emails in one folder or subfolder cannot load messages with the following error:
CONFIG_TEXT: Error when communicating with the mail server
The same error appears in an attempt to remove a huge number of emails (~ 5000) at once.
Tunning IIS FastCGI Settings using steps from this article did not resolve the issue
The cause is not clear
For Horde 5.0 and later: Contact Horde Technical Support for assistance.
As a workaround, perform one of the following:
- Clean up unnecessary emails from mailbox and split emails into different subfolders using filters
- Use MailEnable webmail as an alternative to Horde
For Horde 4.x and earlier: set "$conf['server']['sort_limit']" value in %plesk_dir%webmail\horde\horde\config\conf.php file:
Changing 'sort_limit' option in 5.0 and later versions will not take affect because it was discontinued (dropped) starting from Horde 5.0.