The email envelope refers to the metadata that is hidden from the recipient's view and contains essential information for email delivery. This metadata includes details such as the sender's email address, recipient's email address, email subject line, and routing information. Think of the email envelope as the outer packaging of an email, containing information necessary for the email to reach its destination. It is responsible for ensuring that the email is properly routed through the internet to the recipient's email server.
On the other hand, the email header is the visible portion of an email that recipients see when they open their inbox. It includes information such as the sender's name, subject line, and timestamp. The email header also contains additional details like the sender's email address, reply-to address, and any tracking or authentication information. Unlike the email envelope, which is primarily concerned with delivery logistics, the email header focuses on providing recipients with key information to help them understand the content and context of the email.
In summary, while both the email envelope and header are integral parts of the email delivery process, they serve distinct functions. The email envelope contains hidden metadata essential for routing and delivery, while the email header is the visible portion of the email that recipients interact with and contains information to help them understand and engage with the email content. Understanding the differences between the two components is essential for effective email marketing strategies and optimizing email deliverability and engagement on mobile devices.