I have a raspberry pi running postfix. I Realised unless I open port 25 I absolutely cannot receive emails (I have 587 open and can send but not receive them). However I heard there are scaries online which someone could potentially send emails from your server without consent. I believe as well my ISP doesn’t block port 25. Is there anything I should do right now before opening port 25, or should everything be safe enough?

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16 points

friends dont let friends host email. its just become too top heavy (complexity-wise) if you want it to be fully functional and secure.

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-1 points
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100% agreed. It’s well worth outsourcing to someone else for $10/mo versus the amount of work it takes to do it well unless you’re a large business.

I’d make this argument for DNS too - a lot of work for how easy it is to pay someone else to handle it.

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2 points

How can I have reliable email that I can control, then?

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14 points

Buy your own domain name and put it in front of someone else’s service. This is going to be a ton of work to do correctly and you’re unlikely to be able to host it out of your house.

Also, something you’re running off a Raspberry Pi in your house is not going to meet most definitions of ‘reliable’.

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1 point

What “someone else’s service” would you recommend?

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10 points

If you own your domain name, then you can use any email service and still have control over it and move around if needed.

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