Proof of email delivery

How Email Open Tracking Works and Its Limitations

October 26, 2026 / in Blog / by Zafar Khan, RPost CEO

Why Engagement Metrics Alone Cannot Establish a Reliable Record of Business Communication.

Every day, businesses send important emails to customers, partners, employees, and suppliers. Some contain proposals, while others carry contracts, payment instructions, legal notices, or time-sensitive information. Once an email is sent, people ask a familiar question: Did the recipient actually open it?

When Should You Use Certified Email Instead of Regular Email?

September 25, 2026 / in Blog / by Zafar Khan, RPost CEO

When Proof of Email Delivery, Content, and Timing Matters.

Most business emails, such as a quick project update, meeting follow-up, or routine question, don’t need special proof or evidence. Rather, they can usually be handled with regular email. But some messages carry more weight. For instance, a deadline may depend on when a notice was delivered, or a customer may later dispute what was sent. In such situations, simply having a copy in your Sent folder may not provide the email proof you actually need.

What Counts as Proof an Email Was Sent, Delivered, Opened, and Read?

September 04, 2026 / in Blog / by Zafar Khan, RPost CEO

Proof an Email Was Sent vs. Proof It Was Delivered.

When an important email becomes part of a dispute, regularly used phrases like “I sent it” or “I received it” can mean very different things. A sent folder may show that a sender clicked Send, an email delivery receipt may indicate that a mail system accepted a message, email open tracking may record an interaction with the message, and an email read receipt may suggest that a recipient’s email client reported it as opened.

How to Prove Email Delivery & Replies: Solving the ‘I Didn't Get the Email’ Excuse

February 25, 2025 / in Blog / by Zafar Khan, RPost CEO

What May Seem Like a DOGE Dodge -- “I Didn’t Get the Email”—May Be a Legit Technical Issue.

Armand here, RPost’s product evangelist armadillo. Since I am apolitical, I thought I would opine on only the technology that DOGE appears to be using via the US Office of Personnel Management (OPM) to send notices to Federal employees across various departments, agencies and entities, and common misconceptions related to email delivery.

Can You Serve Court Papers by Email?

April 11, 2022 / in Blog / by Zafar Khan, RPost CEO

The $100 million “Hermès” Registered Email™ Message (& CLE Webinar That Tells More) What a deal! My favorite functional yachting sportswear at 70% off! Or so I thought. Nearly every successful product brand is facing a strange new competitor — their own “fake” self. Let me explain how this plays out.