3Com 3C17205-US - Corp SUPERSTACK 3 SWITCH 4400 24PORT Implementation Manual page 83

You can configure the email address to which you wish the notifications
to be sent. However, you cannot change the factory default notification
messages for event emails.
RMON traps continue to be sent, in addition to any email notifications
you may receive.
The events that can generate email notification are:
Unit powers up.
Fan in the unit fails.
Unit in the stack fails.
A link fails or returns to service — you can select specific links that you
wish to receive messages for, for example, a mission-critical link to a
server.
A resilient link activates.
A security violation occurs.
RMON and the Switch 83