I want to know how to setup email server is correct?
Always tips The message could not be sent because a connection could not be established with the SMTP server.
Now the Epo server can connect to other server normally, but cannot user email server.
ePolicy Orchestrator cannot send Notification or Response email to web-based services such as Gmail, Hotmail, or Office 365 Technical Articles ID: KB60405 Last Modified: 9/12/2016
Are you blocking SMTP on the ePO server?
VirusScan Enterprise 8.x Access Protection rule blocks outbound SMTP mail on Port 25 Technical Articles ID: KB50707 Last Modified: 11/3/2016
Couple of other areas to confirm:
- Has the ePO server been added to your SMTP mail server white-list
- ePO Server <> Configuration <> Server Settings <> Email Server: Test email
- Can it connect to your SMTP mail server - Connect to your mail server - SMTP communicates over port 25. Attempt to use TELNET to connect to your mail server.