About vacation messages
A vacation message is an email utility that automatically sends a standard reply message to incoming email messages. This feature is most often used to notify the sender that you are unable to respond to email for a period of time.
You can: view, turn on, turn off, and change vacation messages.
Both vacation messages and responders automatically reply to incoming email. However, they have these key differences:
Responders can be set up only for aliases; vacation messages are set up for email addresses.
Vacation messages are sent only once. If a user sends multiple messages to an email address that has a vacation message enabled, they receive only one automatic reply. Messages sent to aliases using responders receive replies each time the message is sent.