The SMTP channel allows the logging server to e-mail logged events. Typically, the SMTP channel is used to e-mail system critical events, such as a server abend, to a system administrator's mailbox, cell phone, or other e-mail enabled device. To enable e-mail notification, administrators must configure a notification filter and select the SMTP Channel object as one of its Notification Channels.
At startup, the SMTP driver, lgdsmtp, performs a server check; that is, the driver attempts to connect to the designated host at port 25. The server check verifies that the driver can communicate with the server before it attempts to relay events. If the server check fails, the SMTP driver refuses to load. This is done to ensure that no events are lost due to misconfiguration. For troubleshooting purposes, this event is written to the log file. For example, in the case of NetWare®, the etc/logdir/log would have the following entry:
lgdsmtp.nlm failed to load Error Code -6
NOTE: The SMTP driver does not buffer events that are undeliverable because of misconfiguration or a server failure.
The SMTP channel driver can send events through servers that require SMTP authentication as long as a valid username and password are defined in the Channel object configuration. If the username and password are configured, the SMTP driver always attempts SMTP authentication when connecting with the relay host. It does not, however, distinguish whether or not this authentication is actually successful and tries to send the message in either case.
The SMTP driver cannot authenticate with an SMTP server on which SMTP-after-POP is enabled.
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