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What is the difference between a header and an envelope? Explaining how email is delivered
2021-01-18(Updated: 2024-12-24 )
Email Delivery Basics


This time, we will be talking about the "Header To" and "Header From" that represent the "recipient" and "sender" that you see when receiving an email, as well as the destination address "Envelope lawyer email list To" and sender address "Envelope From" that are written separately from that information.



Table of Contents [Hide]

1. About "Header To", "Header From", "Envelope To", and "Envelope From"
2. Usage of "Envelope To", "Envelope From", "Header To", and "Header From"
3. Why are there two types of To/From?
3.1.Advantages​
Disadvantages​
4. How to check the envelope "From"
5. Summary
About "Header To", "Header From", "Envelope To", and "Envelope From"
Header from/To, envelope from/To in a letter

[About "Header To" and "Header From"]

"Header To" and "Header From" refer to the information that would be written on the letter paper inside the envelope .

The "To" header corresponds to the addressee of the letter paper, and the "From" header corresponds to the sender of the letter paper.

This "Header To" and "Header From" may differ from the actual destination.



[About "Envelope To" and "Envelope From"]

On the other hand, "envelope To" and "envelope From" refer to the information that would be written on the envelope , in the case of the letter example mentioned earlier .

"Envelope To" is the addressee of the envelope, and "Envelope From" is the sender of the envelope.

If the information in the "Envelope To" and "Envelope From" fields is not correct, the email cannot be sent correctly, so they can also be thought of as the true sender/recipient of the email.