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At what level do ISPs control ports? (beehaw.org)

submitted 11 months ago by [email protected] to c/[email protected]

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I'm aware most ISPs do not allow for port 25 to be open for email use outside of business licenses, but at what level is that controlled? Can I get around that by owning my own router? Owning my own modem or ONT? Or is this just a thing they mystically control further up the pipeline that a relative layman such as myself can't get around?

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[–] [email protected] 6 points 11 months ago (1 children)

You're already using an SMTP relay so why not host your Mail-in-a-box server at home? Been doing that for years. Also, check out Mailcow if you're interested in running your server as a docker container.

[–] [email protected] 2 points 11 months ago

I've been running my own mail server since ~2002. For many years I was using qmail, of all things, on a home ISP connection. I wrote a semi-popular guide on adding spamassassin support to qmail. I was a true believer!

When hosting email from consumer internet became untenable, I migrated to digitalocean and Mail-in-a-box. To be honest, it's worth the $15 to have a 100% always-on device hosting the email. I host lots of other stuff at home and having email be a separate thing makes it much easier.