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TheRtRevKaiser@kbin.social

At what level do ISPs control ports? (self.technology)

submitted 1 year ago by KasanMoor to c/technology

23 comments fedilink hide all child comments

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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[–] Brkdncr@kbin.social 5 points 1 year ago (1 children)

You can use a port reflector service. No ip.com might still offer it. Basically forwards anything incoming to their ip on port 25 to your ip and whatever port you specify.

[–] shiri@foggyminds.com 5 points 1 year ago (1 children)

@Brkdncr @KasanMoor I don't think they care about incoming port 25, the blocking being talked about is outgoing 25.

[–] Brkdncr@kbin.social 1 points 1 year ago (1 children)

I just looked they have a service called “alternative port 25” that addresses this issue.

Honestly though, once you start adding up costs for these workarounds you have to wonder if it’s easier to just get a business internet circuit, cloud security gateway, or just host the email online.

[–] shiri@foggyminds.com 1 points 1 year ago (1 children)

@Brkdncr
Or if you're low volume just use a free/cheap relay
@KasanMoor

[–] shiri@foggyminds.com 2 points 1 year ago

@Brkdncr @KasanMoor for reference, mailgun offers a free tier for <5k emails a month. It's what I use for email from any of my servers.