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What is an email header

Introduction

Email headers are a crucial part of every email communication that occurs over the internet. They contain important information about the sender, recipient, and the path the message takes through various servers to reach its destination. In this article, we will explain what email headers are, how they work, and why they are important for email verification.

What is an email header?

In simple terms, an email header is a set of metadata that provides information about an email message. It consists of several fields that contain details such as the sender’s name and address, the recipient’s name and address, the subject line, and the date and time the message was sent.

Email headers are usually hidden from the end-user and can only be accessed by the email client or server. Some email clients allow users to view the headers of an email message by clicking on a specific button or option.

How do email headers work?

Email headers work by providing crucial information about an email message that helps it get delivered to the intended recipient. When an email is sent, it goes through several servers before it reaches its final destination. Each server appends its own metadata to the email header, which allows the next server to identify and route the message correctly.

For example, when you send an email from your Gmail account to a Yahoo account, the email first goes to the Gmail server, which adds its own metadata to the header. Then, the email is routed to the recipient’s email server, which adds its own metadata to the header. This process continues until the email reaches its final destination, and the recipient’s email client displays the message to the user.

Why are email headers important for email verification?

Email headers are important for email verification because they contain valuable information that can help verify the authenticity of an email message. For example, the email header contains the sender’s IP address, which can be used to determine the geographic location of the sender. This information can be used to identify potential spam or phishing emails.

Email headers can also be used to verify the integrity of an email message. The header contains a unique identifier called the Message-ID, which can be used to track the message as it moves through the internet. This helps prevent email spoofing and ensures that the message is not tampered with during transmission.

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