In the past I have had reason to complain about non-delivery and incorrect delivery of items to my address.
Additionally, he can claim damages for non-delivery.
He then deleted both the record of the sent mail and the message indicating non-delivery.
Only if the seller fails to present complying documents by the conclusion of the contract may the buyer treat himself as discharged from further performance and claim damages for non-delivery.
The defendants had made a bad bargain but the contract was held to be valid and the plaintiff's claim for non-delivery upheld.