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I would think returned spam would have to be checked for being spam by servers receiving the returned messages. If they don’t do that and decide whether checki
by Someone 5y ago
I would think returned spam would have to be checked for being spam by servers receiving the returned messages.
If they don’t do that and decide whether checking is needed based on presence of some mail headers, or using heuristics on the subject line, spammers will start faking returned messages.
I think that makes it expensive to return spam. https://99firms.com/blog/spam-statistics/ https://99firms.com/blog/spam-statistics/ says about half of all e-mail is spam, so returning that would increase e-mail traffic and spam checking by 50%.
- GoblinSlayer 5y agoA bounce message can be very small, specifying only three fields: To, From, Date to identify the rejected message. Compared to this spam messages would be much bigger, consisting of html, css, javascript, pdf attachmens, zipped executables etc. The message could be sent to a fixed address, like abuse@same.server; how to check messages on that address is a different story as it's not user messages, but technical messages.