Provided by: qmail_1.06-6.2~deb10u1build0.16.04.1_amd64 

NAME
qreceipt - respond to delivery notice requests
SYNOPSIS
in .qmail: |qreceipt youraddress
DESCRIPTION
When a mail message arrives with youraddress listed in a Notice-Requested-Upon-Delivery-To header field,
qreceipt sends a success notice back to the envelope sender.
WARNING: If you create a .qmail file to enable qreceipt, make sure to also add a line specifying delivery
to your normal mailbox. For example:
/home/joe/Mailbox
|qreceipt joe@nowhere.mil
SEE ALSO
dot-qmail(5), envelopes(5)
qreceipt(1)