email content proof

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.