bounceback

Short definition from Wiktionary

Noun

1. 1
   A rebound.
2. 2
   An economic recovery.
3. 3
   An automated response to an email, indicating that it could not be delivered.
4. 4
   A customized order form sent out with previously ordered goods, encouraging the customer to make a further order, perhaps motivated by a discount or free gift.
5. 5
   A patient who returns with the same complaint.