On Sat, 2019-07-13 at 18:58 -0600, home user via users wrote: > Still, what is the "line and loop, otherwise stop, it's spam." that > Tony mentioned? 'If that line says the "from" is reasonable, look at the lines up to and inclucing the next Received: line and loop, otherwise stop, it's spam.' I think he means: 1. Look at the lines up to and including the next received line. 2. Repeat the process, upwards. 3. Otherwise, stop looking any further, it's spam. When you write an email, your mail client writes some headers above your message, and posts it. The mail server adds more headers above that, and sends it along its way. Every mail server it goes through writes its own headers above the existing ones. They all do that, until you get your hands on it. None of them change existing headers, nor do they write anything below existing headers. There are some exceptions to that rule (of only adding stuff to the top). Your mail client can add headers wherever it wants to, when it receives emails. Chances are that it won't, but since you're the end of the road, it doesn't have to comply with other things. You might have anti-spam filtering software which adds some headers that aren't at the top, as well. List mail servers often add list headers just above the message. This one does, you can see from a message through this list that the message went through a few servers before it reached the Fedora servers, yet there are mailman listserver headers just above the message (the unsubscribe, etc., moderation headers). Look at your original post for this thread, for an example. Above the message are things that are probably from your mail client when you posted it (cc, from, content- details), but could be from the list. Then the list server has added several list- headers above them. Above that are some x-mailman headers, above them are some things from your mail client (user-agent, date, message-id [might be from you, doesn't have to be], subject, to. Above that are received-by headers from the first server that your post went through (three yahoo servers). Above that is a received line from the fedora mail server. Above that are some x-spam markers. Above that some more received lines from the next couple of servers to handle the message. Then some DKIM headers above them associated with the received line above them. Above that, are headers pertaining to the message coming to me from the list. While there's a lot of chaos in there, the "received" headers should be in logical sequence. Stacked on top of each other as each mail server has received the message. If they add extra headers, too, they'd be under *their* received headers. Just think of it as going through several sorting offices, each putting a sticker on top. _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx
