Below is a sample ZMAIL Return Receipt for Certified Delivery. The Return Receipt can be requested by the sender as a mandatory condition for the recipient to decrypt (read) the message.
This receipt confirms that your ZMAIL was delivered and decrypted. The delivery geographical location may be obtained from the IP number by any free whois service, for example http://example.com WHO RECEIVED: Authenticated Email Address of Delivery: firstname.lastname@example.org Recipient Subscriber Name / Organization: JOE M DOE TRUST Originally Sent to: "Joe M Doe, M.D." <email@example.com>, "Mae Doe, RN" <firstname.lastname@example.org>, WHERE: Place of Delivery (IP number): 220.127.116.11 WHEN: ZMAIL Date of Delivery (GMT): Tue, 09 Aug 2006 15:34:02 -0700 HOW: Recipient Browser / Agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 WHAT: Email Subject (sent in plaintext): Updated Agreement ZMAIL Date Sent (GMT): Tue, 08 Aug 2006 10:12:32 -0700 ZMAIL Message Fingerprint: E4630D4C051C86DD0C4444A03FA76BD9 Sent from the location (IP number): 18.104.22.168 Sent from the email address: "John Smith" <email@example.com> ZSENTRY Mail http://zsentry.com Copyright (c) NMA, Inc., 2006.
The message is identified by its subject and by its ZMAIL Fingerprint. The Return Receipt informs the sender WHO decrypted the message (with the recipient's ZMAIL-authenticated name and email address), and also provides information WHERE (the IP number), WHEN (the time), HOW (the browser or email software identification), and WHAT (with message identification) was delivered.
You can use the Return Receipt as evidence for yourself (e.g., was the ZMAIL received?) and your recipients (e.g., that your ZMAIL was sent at the right time).
Read more about the ZMAIL Fingerprint, and the ZMAIL Return Receipt.