provides a connection to a Simple Mail Transfer Protocol (SMTP) Server. Using this tag Fernhill SCADA can
automatically send emails to users. Emails sent this way could contain:
The SMTP Connector Tag
provides a connection to a Simple Mail Transfer Protocol (SMTP) Server. Using this tag Fernhill SCADA can
automatically send emails to users. Emails sent this way could contain:
The SMTP Connector Tag supports the properties of the Active Channel Tag plus these properties:
| Property | Type | Version | Description |
|---|---|---|---|
| HostName | WSTRING | 3.23 | The host name or IP address of the SMTP Server. |
| PortNumber | WSTRING | 3.23 | The port number used for communications. The default port number for SMTP is 25. |
| FromAddress | WSTRING | 3.23 | The "From" address in all emails sent using this connector. Where possible use a real email address to minimize the chance the SMTP server will reject messages sent from this connector. |
| InactivityTimeout | Time | 3.23 | The maximum amount of time this SMTP connector will remain connected to the SMTP server when there are no emails to send. |
| Password | WSTRING | 3.24 | The password used for SMTP Authentication. Note: The password value is encrypted and not stored as plain text. |
| UserName | WSTRING | 3.24 | If set, the SMTP Connector will try and authenticate with the SMTP Server. |
See SMTP Connector Setup Guide for a guide to set up the SMTP Connector tag.
The SMTP Connector Tag supports the STARTTLS extension (RFC 3207). If the SMTP Server supports STARTTLS, Fernhill SCADA will always try and negotiate an encrypted connection.
If the UserName property is configured, the SMTP Connector will try and use SMTP Authentication to login to the SMTP Server. The SMTP Connector currently supports these authentication methods:
 | Information: If you have configured a UserName and Password make sure the SMTP Server supports the STARTTLS extension. If PLAIN authentication is used without encryption, the password is easily read and decoded by anyone who has access to the network. |
When PLAIN authentication is used, the encoded username and password are not shown in diagnostic logs. If you monitor communication using the Data Log Window the encoded username and password will not be shown.
The SMTP Connector Tag supports the data properties of the Active Channel Tag plus these properties:
| Property | Type | Description |
|---|---|---|
| MessagesRejected | UDINT | The number of messages rejected by the SMTP Server. |
| MessagesSent | UDINT | The number of messages accepted by the SMTP Server. |
| SMTPAuthMethod | STRING[32] | The authentication method used to login to the SMTP Server. This property will only show a value if the SMTP Connector Tag is online to the SMTP Server. |
The SMTP Connector Tag supports the tag commands of the Active Channel Tag plus these commands:
| Tag Command | Version | Description |
|---|---|---|
| SendMessageTo | 3.23 | Sends an email to a user. |
The SMTP Connector Tag builds on the features of these tag types:
To learn about the properties common to all active channels.
To learn about abnormal conditions in SCADA applications.
For the meaning of terms used in Fernhill SCADA.