Header protection is not DKIM.

Answer Header protection is not DKIM. RFC 9788 describes header protection for cryptographically protected email. The document is titled Header Protection for Cryptographically Protected Email. It is about protecting headers on an encrypted or signed message. That work is not the same as a domain signature, and it is not placement. A rented send is one letter to someone else's list. Protecting headers does not make the letter wanted, and it does not give permission to send it.

The note that started this: RFC 9788, Header Protection for Cryptographically Protected Email, RFC 9788.

Sellers treat a cryptography phrase as if it were a promise about where the letter lands. It is not. If you are comparing best solo ad vendors, ask whether the quote is for a letter to a named list or for a feature on an encrypted or signed message. A solo is ordinary mail to someone else's file. Header protection does not change whose file it is. If the seller cannot separate those sentences, you are not looking at a finished offer.

The document is a fact about mail software. It is not a solo ad price, a rank, or proof that a stranger opted in. An encrypted or signed message can have its headers protected and still be mail nobody asked for. The protection is about the message. It is not about the person's request. A wanted letter with no such protection can still be the right buy. An unwanted letter with perfect protection is still unwanted.

What does RFC 9788 describe?

RFC 9788 describes header protection for cryptographically protected email. It is about protecting headers on an encrypted or signed message. Header protection is not DKIM, and it is not placement.

In plain words, the document is for messages that are already cryptographically protected, meaning encrypted or signed. Header protection is about those headers staying with that protection. A domain signature is a different claim, tied to a domain, and the document does not turn one claim into the other. Calling header protection by a domain-signature name will not help you read an order. It will only make two different ideas look like one invoice line.

Most solos are not sold as encrypted letters. They are sold as a plain letter with a link. If the sample is a normal letter, this citation is not about the sample. If the seller cannot say whether the mail is encrypted, signed, or plain, they pasted a title they have not used. Ask which one you are buying. Then judge the list. The title can leave the conversation as soon as the form of the letter is clear.

• Header protection is not written down as DKIM.
• The quote is not described as placement.
• The seller says whether the letter is encrypted, signed, or plain.
• The list, the domain, and the refund line are on the order.

Is header protection the same as a domain signature?

No. Protecting headers on an encrypted or signed message is not the same as a domain signature. Header protection is not DKIM. Neither fact is proof a stranger opted in.

A domain signature is a claim about a domain and a message. Header protection is about headers on a message that is already encrypted or signed. You can have one, the other, both, or neither, and still have the same list problem. The list problem is whether the person asked for the letter. No form of protection answers that. A buyer who stops at the protection has stopped before the purchase.

Sellers who blur the words are usually avoiding a harder sentence. They do not want to name the list. If you are selling, do not use this document as the reason someone should pay. Say whose file you will mail, from which domain, and what you will do if the send is not the send you described. Leave the citation off the quote. A protected header on mail nobody asked for is still mail nobody asked for.

What does a buyer still write on the order?

The list, the sending domain, and the refund line. The document is a fact about mail software. It is not a solo ad price, a rank, or permission to mail.

Write the list so a later complaint names a file, not a topic. Write the sending domain the reader will actually see. Write the refund line in words that say what a mismatch looks like. A mismatch is a different list, a different domain, or a letter you did not approve. A missing header-protection feature is not the mismatch you came to buy. Do not let the refund line drift into cryptography.

When the conversation stays on cryptography, the file is still unnamed. That is the tell. Look for safe solo ads sellers who will write the list, the domain, and the refund line without changing the subject. Header protection is not DKIM, and it is not a person who opted in.