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At what level do ISPs control ports?
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this post was submitted on 04 Aug 2023
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Technology
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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.
@Brkdncr @KasanMoor I don't think they care about incoming port 25, the blocking being talked about is outgoing 25.
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.
@Brkdncr
Or if you're low volume just use a free/cheap relay
@KasanMoor
@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.
www.mailgun.com/products/send/…