This is an EMAIL server used by the SCADA Node to read Alarm Acknowledgement emails and Global Scripts via EMAIL. This is similar to your personal email account. Usually, this is your corporate email server, with an account set up especially for the SCADA node.
This can also be a personal account, but you must remember not to remove the incoming email from the server, or else the SCADA node will never see them.
This is not usually the same as the SMTP Sever because the Project Node is usually not installed with POP3 email server. ) IIS does not supply a POP3 email server).
The user can specify how often the SCADA Node checks for email. The SCADA node removes the email from the server, if it is a valid alarm or script email with the appropriate security code.