There's a long running joke response to 'solutions to spam' that's been running on slashdot since they were giving out 5-digit uids. cf. http://www.ninjavspengu

There's a long running joke response to 'solutions to spam' that's been running on slashdot since they were giving out 5-digit uids. cf. http://www.ninjavspenguin.com/blog/2007/10/01/slashdot-spam-post-wizard/ http://www.ninjavspenguin.com/blog/2007/10/01/slashdot-spam-... Although totally flippant, and never addressing the specific issues in a post directly, I've yet to see a thread on /. in over 10 years in which this was not an appropriate response. Mail is big-H Hard. Yesterday there was a discussion on the demise of the self-hosted mailserver, and there's a real reason why MailChimp etc have become a no-brainer for small-medium enterprise. Trying to run your own mailserver is increasingly becoming a fools errand. If you want to hit Yahoo and Gmail, you get a solid reverse DNS, implement SPF and DKIM and hope that the spec doesn't change under you. Even then you need to maintain relations with their team if you're sending more than a couple of hundred emails a day to their platform. Throttling is arbitrarily switched. 50/second, 10/second, 1000/second. Unpublished guidelines which change and you need to comply or your server gets a mysterious 5xx error response which you have to debug. Other error messages related to mailboxen, existence of accounts etc. all have to be handled and appropriately applied to addresses in your list. Send too many post-bounce messages and again the banhammer will be wielded. If you want to get into AOL Goodmail was one option. For Hotmail you have 'Sender Score' certification which costs an arm and a leg and is completely useless for small-volume senders. At any point in these, if some jackass passes anything that hits their heuristics you have to do a personal contact contact back and forth with the ISP, and god forbid you encounter human-modified SURBLs. These are terribly subjective, frequently on vacation, but relied on as gospel by many mid-level admins in institutions such as universities and mid-level enterprise. Email is broken. It was fundamentally based on trust in the early days, and seeing as PGP never (understandably) took off, the whole system is IMO beyond redemption. What we see now is a growth in systems designed to replace email as a functional method of trusted communication. Opt-in services like Twitter, Facebook for interpersonal contact and groupwise style systems intraoffice. While Gmail has performed admirably to save email's utility for the basic user, that their systems will never be taken up by certain industries and orgs (central control issues, incompetence, revenue streams[SenderScore]) means I think it's well into the long decline we saw with Usenet. What will emerge, who knows, but I see little hope for the technological replacement or fix to email which wouldn't in using essentially give up all central control to once agency, be it Google, Facebook or whoever.