User manual

Using the Mail Service
256
33002479 06 07/2008
Introducing the Electronic Mail Notification Service
General The electronic mail notification service allows controller-based projects to report
alarms or events. The automation controller monitors the system and can
automatically create an electronic mail message alert with data, alarms, and/or
events. Mail recipients can be either local or remote.
z Based on predefined events or conditions, messages are created using the
MSTR function block.
z The email message is constructed from predefined headers plus variables and
text (a maximum of 238 bytes). This message is sent directly from the automation
system to the local email server.
z Mail headers contain common predefined items—recipient list, sender name, and
subject. These items can be updated by an authorized administrator.
Mail System
Types
The Simple Mail Transfer Protocol (SMTP) provides two mechanisms for the
transmission of email messages:
z direct connection
z relay system
Mechanism Condition Result
Direct connection Sender and receiver are
connected to the same transport
service.
Email messages are sent to host.
Relay system Sender and receiver are NOT
connected to the same transport
service.
Email messages are relayed from
one server to another server.
To relay messages, the SMTP
server must be supplied with the
address of the:
z destination host
z destination mailbox