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hot net neutrality take
port 25 was the real net neutrality fight and we lost it long ago. now we merely scramble to take back ground we previously ceded.
hot net neutrality take (explained) (1/3)
@djsundog This is an excellent take!
For the people not familiar with the meaning of "port 25": This is the port that mailservers communicate over (like webservers and browsers use 80 and 443). Because the mail protocol SMTP was never designed nor improved to inhibit exploitation like spam or impersonation, it was (and is) very easy to abuse, and spammers use hijacked home routers, pcs, and other devices to try to deliver spam...
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hot net neutrality take (explained) (2/3)
… As mail providers did not act fast enough to establish authentication protocols like DKIM, DMARC, and DANE, the only fast counter-acting method was to create blocklists with IPs that were found to deliver spam. The organization that developed to be the Google of this was Spamhaus (spamhaus.org)…
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hot net neutrality take (explained) (3/3)
…Now, most mail servers run on dedicated servers in datacenters, and not at home, but most hijacked machines are home pcs. So Spamhaus started collecting all the end-user IPs from ISPs, and started blocking those by default ¯\_(ツ)_/¯ 
This means it is practically impossible to run a mailserver from home, increasing the threshold for people to start fiddling and learning
hot net neutrality take (4/3)
Maybe Spamhaus is the Cloudflare rather than the Google of spam-prevention providers 