A POP download is not an open.

Answer A POP download is not an open. RFC 1939 is Post Office Protocol version 3. The document is titled Post Office Protocol - Version 3. A download is not a read, and it can remove the server copy. Do not claim modern providers only use POP. The client taking a copy is not a person opening the letter. If you are paying for opens, do not accept a fetch under that name. The invoice and the event have to be the same thing.

The note that started this: RFC 1939, Post Office Protocol - Version 3, RFC 1939.

The report is where the swap hides. If you are about to buy solo ads, ask what an open count measured. If it measured a POP download, you bought a fetch. A fetch is not a read. It can also remove the server copy, so the message may not still be there as proof someone returned to it. A missing server copy is not a read. It is a possible result of the download.

That is a fact about mail software. It is not a solo ad price, a rank, or proof that a stranger opted in. A download does not show that anyone joined. It shows that a client took mail. Do not widen the document into a claim that modern providers only use POP. That claim would make a fetch look like the way everyone reads. The document does not say it. A download is not a read even where POP is what moved the mail.

What is RFC 1939?

RFC 1939 is Post Office Protocol version 3. The document is titled Post Office Protocol - Version 3. A download is not a read, and it can remove the server copy. Do not claim modern providers only use POP.

Say what a download is, and stop. The client retrieves the message. Retrieval is not a person reading. Because the download can remove the server copy, a seller may be unable to show the message later. Do not call that missing copy a sign of interest. Missing can mean removed. Removed is not an open, and it is not a second visit.

If a metric is being sold, write the metric into the order. If the seller says opens, define that word as something other than a POP download, or refuse the word. Sellers should not let a fetch ride under a prettier name. If the fetch is POP, say the pull is not a read and can remove the server copy. Then talk about the list.

• A POP download is not counted as an open.
• A download is not described as a read.
• A removed server copy is not called interest.
• The list, the sending domain, and the refund line are on the order.

Is a POP download an open?

No. A POP download is not an open. A download is not a read, and it can remove the server copy. The client taking the message is not a person opening it. If the server copy is gone, you also do not have that copy as proof of a later read.

The buyer consequence is a count you cannot audit as attention. You cannot point at a read, because the event was a download, and the download can remove the server copy. You are left with a tally and a story. Do not pay the tally as if a person had opened the letter. Retrieval is the protocol. A person deciding to read is not what RFC 1939 records.

The seller consequence is a dispute you worded in advance. If the buyer expected reads and you delivered downloads, the refund line is the only sentence that can end it. Write that sentence before the send. Say which event you will report. If the event is a POP download, do not call it an open after the fact.

Does a POP download prove opt-in?

No. That is a fact about mail software. 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.

A client can download mail the person never asked for. The download does not repair that. Software can retrieve a message whether or not anyone joined. Ask the joining question in words. The protocol will not answer it, and a missing server copy will not answer it either.

solo ad pricing is the price of one letter, not the price of a download dressed as an open. RFC 1939 will not set that price. A POP download is not an open. If you buy, buy a named list, a named sending domain, and a refund line. Do not buy a fetch and let someone call it reading.