On the other hand, you may have questions such as, "I know I need to set it up, but I don't really understand," or "How does it even work?"
This time, we have summarized how sending domain authentication works and how to set it up. We hope that it will be useful to you.
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Contents of this article
Sending Domain Authentication and Background Information
How emails are delivered
How spoofed email works
What is sending domain authentication?
Overview of SPF, how it works, and how to set it up
What is SPF?
How SPF works
How to register an SPF record
Challenges facing SPF
DKIM overview, mechanism and setup
What is DKIM?
Digital Signatures and Public Key Cryptography in DKIM
How DKIM works
How to set up DKIM
DMARC Overview
Sending Domain Authentication and Background Information
Sending domain authentication can be easily understood by vp engineering email lists knowing "how emails are delivered to the recipient" and "how spoofed emails are transmitted."
How emails are delivered
To understand sending domain authentication, let's first look at how email gets to your recipient.
The email is sent from the PC to the company's mail server (1). After that, the DNS server is queried for the destination IP address (2). This area becomes the sending domain.
We usually recognize email addresses and URLs as alphabets (like example.com), but computers cannot recognize them as alphabets. URLs and email domains are all originally IP addresses. Think of an IP address as an address in the Internet space. Just as you need an address to deliver mail, you also need a destination IP address to send email.
The DNS server queries the host name and IP address of the mail server of the destination domain. In order to send an email, the IP address must be queried to the DNS server once.
The recipient's mail server then returns an IP address (3), and the email is sent to that IP address (4).
The email that enters the recipient's mail server is delivered to the mailbox on the recipient's PC (5).
How spoofed email works
A spoofed email is an email that pretends to be from someone else by falsifying the From (sender) address. Spoofed emails are sometimes used in phishing scams to steal personal information by pretending to be from a financial institution or a close friend.
Sending domain authentication is used to determine whether an email is spoofed or not. In addition to the technical specifications of email, it uses the DNS mechanism to authenticate the sender.
An email is made up of multiple parts ( multiparts ) , such as the header and body . The header is the part that sets the destination, sender, subject, etc.
