- Plesk 12.5 for Windows
- Plesk Onyx for Windows
Plesk is not accessible with the following message is web browser:
ERROR: PleskMainDBException: An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full.
(Error code: 2002) (db.php:444)
Cannot sent email. The following error can be found in Mail Enable Administration > Servers > localhost > Services and Connectors > SMTP > Logs > Debug > SMTP-Debug.log :
PLESK_INFO: Message Delivery Failure. Attempt (1): Could not connect to mail server for domain (example.com). The remote mail server could not be contacted at this time. Message has been requeued.
TCP stack number of connections limit is reached.
Login to the server over RDP
Create two parameters in Windows Registry:
TcpTimedWaitDelay (DWORD) = 30
MaxUserPort (DWORD) = 65534
Reboot the server