E-mail header – Definition and meaning
What is E-mail header? Learn how to use the email header to trace the sender and the route of your emails.
Email header: a comprehensive guide
The email header is an essential part of every email message, containing important information about the sender, recipient, date and whereabouts of the message. In this article, you'll learn everything you need to know about the email header, including its structure, how it works and what role it plays in email communication.
What is an email header?
The email header is the part of an email that is not displayed in the message content, but contains information about the transport of the email. It is generated automatically by email programmes and contains details such as
- From: The sender of the email
- To: The recipient of the email
- Subject: The subject of the email
- Date: When the email was sent
- Previous email addresses: Information about previous recipients
- Server information: Details about the servers that processed the email
Why are email headers important?
Email headers are important for several reasons:
- Troubleshooting: if there are problems with email delivery, the header information can help identify the source of the error.
- Spam analysis: Email headers can be used to analyse spam messages by seeing where they come from and the route they have taken.
- Security: They help to detect phishing attacks and other threatening security issues by verifying the authenticity of the sender.
How do you read an email header?
To read an email header, open the email in your mail client and look for the "Show details" or "Show header" option. This will display the complete header. The information is often structured in a multi-line format. What is important is the order and how the information is linked to each other.
Example of an email header
From: Example sender <[email protected]> To: Example recipient <[email protected]> Date: Mon, 20 Mar 2023 15:25:30 +0000 Subject: Test email Received: from mail.domain.com (mail.domain.com. [192.168.0.1]) by mx.google.com with ESMTP id abcdefg12345 for <[email protected]>; Mon, 20 Mar 2023 15:25:30 -0000 (UTC)
Frequently asked questions about email headers
What does an email header contain?
An email header contains information about the sender, recipient, subject, date and details of servers used in the sending process.
How can I analyse email headers?
Various online tools can be used to analyse an email header, decode the header information and clearly show the underlying problems.
Illustrative example on the topic: email headers
Imagine you receive an email from an unknown sender claiming to be a representative of your bank. At first glance, the email looks legitimate. But when you analyse the email header, you discover that the email was sent from a dubious server and not from your bank's official server. By analysing the header, you have therefore established that it is a phishing attempt. This shows how important it is to know the information in the email header and to interpret it correctly.
Conclusion
The email header is an often overlooked but extremely important part of email communication. It provides valuable information that can help not only to troubleshoot but also to detect security threats. A deeper understanding of the email header is essential for anyone who regularly sends or receives emails.
If you would like to learn more about related topics, you may also be interested in our articles on cybersecurity or spam filters.
Frequently asked questions
An email header is made up of several important elements. These include the sender address, the recipient address, the date the email was sent and the subject of the email. In addition, the header also contains information about the servers that processed the email and any previous email addresses. These components are crucial for tracking and analysing emails.
To display the email header in your email client, you usually have to open the email and search for an option such as 'Show details' or 'Show header'. This function varies depending on the email programme. If you call up the header, you will receive a detailed overview of the technical information of the email, which can help you to analyse it.
The email header plays a central role in spam analysis as it provides information about the origin of the email and the route it has taken. By checking the servers that processed the email, users can determine whether a message comes from a trustworthy source or whether it is spam. This analysis helps to identify and block unwanted emails.
The email header offers several security functions that help to recognise phishing attacks and other threats. By analysing the sender address and server information, it is possible to determine whether the email actually originates from the specified source. The header also enables suspicious activity to be tracked and thus contributes to the overall security of email communication.
To decrypt an email header, you can use various online tools that have been specially developed for analysing email headers. These tools help to convert the technical details into understandable information so that you can find out where the email came from and which servers were involved. A thorough analysis can give you valuable information about the authenticity of the email and highlight potential security risks.