MAIL FROM: <[email protected]>

From: [email protected]
Date: Fri, Feb 15 2002 16:54:30 -0800
To: [email protected]
Subject: here's a sample

Let’s continue with our postman analogy to explain this.

In this example, the postman is delivering a letter with the following details:

In this case, the return address on the envelope (MAIL FROM) is from a specific department (child.example.com) of a larger organization (example.com), and the signature on the letter (From) is from someone at the larger organization ([email protected]).

This is like the postman showing you an ID that says he’s from a specific department of the post office, and the return address on the envelope is from the main post office.

If the Domain Owner (the person who owns example.com) has requested relaxed SPF mode, then DMARC would say that the identifiers are in alignment. This is like saying it’s okay that the postman is from a specific department of the post office, as long as he’s from the post office.

But if the Domain Owner has requested strict SPF mode, then DMARC would say that the identifiers are not in alignment. This is like saying the postman’s ID must exactly match the return address on the envelope.

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