A refusal code is not a delay and not a refund.

Answer A refusal code is not a delay and not a refund. RFC 7504 describes the SMTP reply codes 521 and 556. The document is titled SMTP 521 and 556 Reply Codes. A host that refuses mail is a different event from a temporary failure. Do not invent other codes. 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.

Cream stationery and a teal accent on a dark navy desk — A refusal is not a pause and not a refund.

The note that started this: RFC 7504, SMTP 521 and 556 Reply Codes, RFC 7504.

A solo ad is one rented letter to someone else's list. People using solo ads for affiliate marketing sometimes hear that a host refused the mail and then wait, as if the refusal were a pause. RFC 7504 is about those reply codes, 521 and 556, not about a clock you can outwait. A refusal is a different event from a temporary failure. Waiting will not turn a refusal into acceptance. The code is also not money back. The refund, if you have one, is the refund line on the order.

The page is about mail software. It does not price the solo, it does not rank the seller, and it does not prove a stranger opted in. Both 521 and 556 are the reply codes the document describes. This note will not invent other codes and will not split them into extra stories. A seller who adds a different code to soften a refusal has left the page. You still name the list, the sending domain, and the refund line. A protocol feature is not that letter, and it is not permission.

What do the reply codes in RFC 7504 mean here?

RFC 7504 describes the SMTP reply codes 521 and 556. A host that refuses mail is a different event from a temporary failure. A refusal code is not a delay and not a refund.

Plain words: a host can refuse mail, and that refusal is not the same event as a temporary failure. The document names the reply codes 521 and 556 for that subject. A refusal means the host is not taking the mail. A delay would be a temporary failure, which the document treats as a different event. Calling a refusal a delay changes the fact. Calling the code itself a refund changes the subject from mail software to your money, which the code does not handle.

Buyers get hurt when they wait on a refusal and call the wait patience. The host already refused. Patience does not rewrite that event into a delivery, and it does not create a refund. Sellers get hurt when they describe the refusal as a short pause and the buyer later asks for the letter that never went. The honest sentence is small. The host refused. That is not a delay, and it is not the refund line. If the order has no refund line, the code still will not become one.

The seller does not call a refusal a delay.
The buyer does not treat 521 or 556 as money back.
No one invents a reply code the document does not name.
The order names the list, the sending domain, and the refund line.

Is a refusal code a solo ad price or a rank?

No. 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 price is what you agree for the rented letter. RFC 7504 does not set it. A rank would compare sellers. A host refusing mail does not compare them, and it does not prove a stranger opted in. A refusal can happen to a careful sender and to a careless one. The code does not tell you which list you bought. If a pitch treats a clean log as a rank, the pitch has left the document. The document is about reply codes for refusal, set apart from temporary failure.

Where does a refund come from if mail is refused?

A buyer still has to name the list, the sending domain, and the refund line on the order. A reply code does not write that line.

Name the list so a refusal is about a stated audience, not a vague file. Name the sending domain so you know which domain was supposed to send. Name the refund line so a refusal has a commercial result you already wrote, instead of a code pretending to be that result. The specification will not choose the list or the domain. It will not return the fee because a host said no. The no is a mail event. The refund is an order event. Keep them apart.

Sellers who offer the code as the refund are offering a number in place of a promise you can read. Buyers who accept it are leaving without a written line. When you buy solo ads, put the refund line on the order before anyone talks about 521 or 556. A refusal code is not a delay and not a refund. It is not proof a stranger opted in, and it is not a reason to invent some other code.