An OpenPGP signature is not DKIM.

Answer An OpenPGP signature is not DKIM. RFC 3156 describes MIME security with OpenPGP. A signature on the content is not a domain signature and not permission to mail. The document is RFC 3156, titled MIME Security with OpenPGP. The signature the document is about sits on the content. DKIM is not that signature. A seller who points at a content signature and says the domain is covered has named the wrong object. The wrong object is not permission, either. Nobody asked for your letter just because the content was signed.

Cream stationery and a teal accent on a dark navy desk — A signature on the content is not a domain signature.

The note that started this: RFC 3156, MIME Security with OpenPGP, RFC 3156.

Safe sellers do not need you to become a specialist in signatures. They need to name the list and the domain in plain words. Start there when you read about safe solo ads sellers. If the page you are actually reading leads with a content signature and never names the list, you are not in a buying conversation yet. A rented send is one letter to someone else's list. A signature on the content is not that letter, and it is not a yes from the reader.

That is a fact about mail software or about an old specification. It is not a solo ad price, a rank, or proof that a stranger opted in. A buyer still has to name the list, the sending domain, and the refund line on the order. OpenPGP does not name them. Put a plain exclusion on the order: a content signature is not DKIM, not the sending domain, and not permission. You are not teaching a class. You are stopping a slide from one use of the word signature to another. The refund line covers the slide if you already paid.

What does RFC 3156 describe?

RFC 3156 describes MIME security with OpenPGP. A signature on the content is not a domain signature and not permission to mail. The document is RFC 3156, titled MIME Security with OpenPGP.

Security, in this title, is about the content and MIME. It is not a badge you can paste on a solo ad. Buyers do not have to operate the signature to refuse the badge. You refuse it by asking what was signed and what that signature does not do. It does not do the domain's job. It does not do the list's job. A seller who wants you to inspect a signature instead of the order is moving the work onto you. Do not take the work. Take the answers, or take your money off the table. A healthier-looking signature is still not the check. The check is the letter, the list, and the sending domain.

A content signature is not called DKIM or a domain signature.
The signature is not described as permission to mail.
The list, the sending domain, and the refund line are named.
The buyer is not asked to repair a signature.

Is an OpenPGP signature the same as DKIM?

No. An OpenPGP signature is not DKIM. A signature on the content is not a domain signature. Do not let one use of the word signature stand in for the other.

The slide is easy because both words contain signature. Stop at the noun the document actually gives you: a signature on the content. Then stop at the negation: it is not a domain signature. You do not need a lecture on how a domain signature is built. You need the seller to say, in the order, which domain sends, without pointing at OpenPGP as the proof. If the only proof of the domain is the content signature, there is no proof. The product is still the letter to the list.

Does a content signature grant permission to mail?

No. A signature on the content is not a domain signature and not permission to mail. That is a fact about mail software or about an old specification. It is not a solo ad price, a rank, or proof that a stranger opted in.

Permission is a history with a person. A signature is a mark on content. The mark can be present on mail the person never asked for. It can be absent on mail they did ask for. Either way you still need the list. Either way you still need the sending domain written on the order, not inferred from a signature word. Either way the refund line is what you use when the story of permission was only a story about a signature. Do not let the mark rank the seller or set the price.

Affiliate mail is the same object in this respect. The offer has to be in the letter a person can read. A signed bundle is not the offer unless those words are actually there, and the signature still would not mean the person opted in. When you compare solo ads for affiliate marketing, compare lists and letters, not signature types. An OpenPGP signature is not DKIM. Name the list, the sending domain, and the refund line. A mark on the content is not a yes.