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PostmarkedEmail
What is PostmarkedEmail?
Read the Goodmail/RPost press release:
GOODMAIL AND RPOST SETTLE PATENT SUIT, ANNOUNCE JOINT SERVICEBuilding on CertifiedEmail™ technology, Goodmail and our partners RPost and Epostmarks are pleased to announce their newest offering, PostmarkedEmail, which in combination with U.S. Postal Service Electronic Postmark (EPM) and provides for greater trust and compliance in email delivery.
The U.S. Postal Service Electronic Postmark is an auditable time-and-date stamp service offered under license by the United States Postal Service. The electronic postmark can be used to verify the authenticity of a document or file at a specific point in time.
Electronic postmarks issued by an authorized EPM service provider are stored in their repositories and available for verification for a period of up to seven years from the date of issuance. The USPS serves as the backup verifier for all electronic postmarks issued by our partner, Epostmarks.
Proof of delivery is provided in partnership with RPost, using RPost's patented technology.
PostmarkedEmail combines:- Goodmail’s CertifiedEmail technology that protects the recipients of email by letting them know that the message comes from a trusted sender.
- Electronic postmarks issued by an authorized EPM service provider that are stored in their repositories and available for verification for a period of up to seven years from the date of issuance. The USPS serves as the backup verifier for all electronic postmarks issued by our partner, Epostmarks.
- RPost’s patented Registered Email® technology that protects email senders by allowing them to prove that their message was delivered, what it said, and precisely when sent and received.
- Goodmail customers benefit from exclusive access to RPost’s patented technology for proof of delivery and content of the email in special arrangement with RPost®.
The Technology

Sample PostmarkedEmail Message
The PostmarkedEmail service uses a combination of our standard CertifiedEmail technology in addition to technology developed by Epostmarks and RPost.
- The CertifiedEmail service stores an encrypted hash of each message within the message itself that is verifiable by our participating ISPs. This allows us to verify the integrity of each message sent and received. If the CertifiedEmail blue-ribbon envelope
is on the message, you know that the body of the message hasn't been tampered with since it was sent. Any tampering would cause the encrypted hash and the actual message content to not validate against each other. - Each message that uses the CertifiedEmail technology has a unique serial number. This allows us and the sender to account for each and every message delivered, and to provide extended reporting beyond what is normally available, due to RPost's proof of delivery technology.
- The CertifiedEmail service uses software and/or hardware at our participating ISPs. This means that the CertifiedEmail blue-ribbon envelope verification icon and the security strip in the message (where applicable) are non-spoofable. Since the CertifiedEmail blue-ribbon envelope isn't part of the message body, and requires validation by the receiving ISP, a hacker can't simply put the ribbon image in the body of their message. If attempted on a non-CertifiedEmail message, the blue-ribbon would be missing from the message list; the security strip would be missing from the message and images would not be visible and have a warning (because our ISP partners block images by default).
When offered with legal delivery proof of content and time sent and received, the service combines:
- RPost’s patented Legal Proof® technology to protect the email sender by allowing them to prove that their message was delivered, what it said, and precisely when sent and received. RPost serves as the verifier for proof of delivery and content of Postmarked Email.
- U.S. Postal Service Electronic Postmark as the auditable time-and-date stamp service offered under license by the United States Postal Service. The electronic postmark can be used to verify the authenticity of a document or file. Electronic postmarks issued by an authorized EPM service provider are stored in their repositories and available for verification for a period of up to seven years from the date of issuance. The USPS serves as the backup verifier for all electronic postmarks issued by our partner, Epostmarks.
PostmarkedEmail Features and Benefits
| Features | Benefits |
|---|---|
| Single recipient message security | PostmarkedEmail messages can only be sent to a single email address. This ensures that a particular message can only be received by the one recipient intended. Messages with multiple recipients will fail the PostmarkedEmail encoding process. |
| Proof of Delivery (option) Auditable date and time stamp |
Ability to legally prove the email was delivered and when. RPost’s patented Legal Proof® technology to protect the email sender by allowing them to prove that their message was delivered, what it said, and precisely when sent and received. RPost serves as the verifier for proof of delivery and content of Postmarked Email. |
| Backed by US Postal Inspection Service enforcement | You and your customers feel safe with PostmarkedEmail. The US Postal Service is very experienced in investigating and enforcing mail fraud and has the legal ability to actively investigate anyone tampering with an electronically postmarked message. |
| Low cost | Save money - the cost of communicating to your customers is greatly reduced. |
| Email is green, reduce waste | Improve your brand and the environment. Sending email saves trees. |
| Legally supported by ESIGN and UETA | You're email messages are legally protected - they have legal standing, are valid and enforceable. |
| Consumer visible proof of data integrity | If the message has the CertifiedEmail blue-ribbon envelope icon |
| Archive of the electronic postmark | The USPS seals issued by Epostmarks, Inc. are stored in a USPS-approved secure location for up to seven years from date of issue. |
| Verification service | The USPS acts as the backup verifier for all Electronic Postmarks applied so you can have confidence the archive. |
| Plus all the features of the CertifedEmail service... | Guaranteed delivery to partner ISPs; the blue-ribbon envelope |
Who Should Use PostmarkedEmail?
- Financial Services companies - banks, brokerages, credit card issuers and insurance companies
- Utility providers - water, gas and electricity companies
- Telecommunications providers - Telephone providers, broadband providers, cable companies and wireless carriers
- Providers in regulated industries where "must-receive" communications are common
Top Reasons To Use PostmarkedEmail
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"RPost", "Registered Email" and "Legal Proof" are registered trademarks of RPost International Limited, RPost Holdings, Inc., RPost US, Inc.


