FalseMyrmidon

There was a code change to proton to remove stutters in ER

Yes, you create virtual nics tied to the physical one.

In larger networks VLANs let you do network segmentation across switches, which you can’t really do otherwise.

I wouldn’t bother at home.

Personally I’d probably go with MS hosted exchange or a Google business account. If you don’t trust those entities I’ve heard good things about ProtonMail - I imagine they have some kind of business solution.

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’.

Many ISPs will also block inbound SMTP unless you have business account (and sometimes even then) because it’s a common malware/spam vector.

If you insist on going through with this the key thing is to make sure that you’re not an open relay.

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.

https://www.howtogeek.com/791055/apt-vs-apt-get-whats-the-difference-on-linux/