Information on how to monitor for STMP issues.
When an SMTP error occurs it will trigger an
fn event. This event code refers to
Failed Sending Notification as documented here: Log Event Type Codes .
Include such events in log streams as the log type
fn falls under
User/Behavioral - Failure: See User Behavior Failure codes.
To do this set up a log stream. Refer to Log Streams documentation for information on how to do this.
After configuring the log stream, filter for
User/Behavioral - Failure events to ensure that
fn events are included (User Behavior Failure ).
It’s currently not possible to filter for only a specific event code (
fn in this case), only one or more of the categories of events listed here: Log Stream Filters
To filter for only
fn events this must be done on the log service side.