Self hosted email continues to steeply decline over decades. I know exactly why this is happening. These big providers send most self hosted emails to spam. Then, managing self hosted email itself requires a good amount of technical sysadmin knowledge. Top reasons I think:
1 IP/domain reputation
2 Cloud/VPS IP reputation
3 Misconfigured SPF, DKIM, or DMARC hurts deliverability.
4 Incorrect DNS setup
5 Spam-like sending patterns etc
https://labs.ripe.net/author/artem-berezin/two-providers-a-stubborn-plateau-and-a-very-long-tail-email-in-the-tranco-top-1m/
nixCraft 🐧
npub1es…exjlr
2026-08-17 13:33:07 UTC
Author Public Key
npub1esmepyc8y2l6w03glx325zpjwp5ggvzuhqrg0csfylrevrdejxzsnexjlrSeen on
wss://relay.ditto.pubPublished at
2026-08-17 13:33:07 UTCEvent JSON
{
"id": "0a6910f022fa3b5005b2424d47e9098efe0bc54fcb3726c144ffd871724a9efd",
"pubkey": "cc3790930722bfa73e28f9a2aa0832706884305cb80687e20927c7960db99185",
"created_at": 1786973587,
"kind": 1,
"tags": [
[
"proxy",
"https://mastodon.social/users/nixCraft/statuses/117111101026881371",
"activitypub"
],
[
"client",
"Mostr",
"31990:6be38f8c63df7dbf84db7ec4a6e6fbbd8d19dca3b980efad18585c46f04b26f9:mostr",
"wss://relay.ditto.pub"
]
],
"content": "Self hosted email continues to steeply decline over decades. I know exactly why this is happening. These big providers send most self hosted emails to spam. Then, managing self hosted email itself requires a good amount of technical sysadmin knowledge. Top reasons I think:\n\n1 IP/domain reputation\n2 Cloud/VPS IP reputation\n3 Misconfigured SPF, DKIM, or DMARC hurts deliverability.\n4 Incorrect DNS setup\n5 Spam-like sending patterns etc\n\nhttps://labs.ripe.net/author/artem-berezin/two-providers-a-stubborn-plateau-and-a-very-long-tail-email-in-the-tranco-top-1m/",
"sig": "cc654dc03df11c6ca0b773a2e2295d328860b707da1179b4548b115f3acd037dfb0fe86caf580579a0a6bfdf1bfb98a30a1492afdd421b6d268c04dcba1528da"
}