- Plesk 11.x for Windows
Unable to send mail via Horde. The following error on webpage:
There was an error sending your message: Failed to set sender: email@example.com [SMTP: Failed to write to socket: not connected (code: -1, response: )]
- Mail ports are not opened in firewall
- Mail Enable improperly configured
- Make sure to open ports 25, 110 and 143 TCP in Wiindoes firewall
Inbound IP bindingsat MailEnable - Servers - localhost - Connections - smtp - Properties - Inbound to
Always bind the service to all availalbe IP addressesand restarted Mail server to implement changes.