this post was submitted on 10 Aug 2023
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Not for everyone, but self-hosting isn't so bad.
I've found it to not be worth the hassle. I think it really isn't worth it for a very select few people who are super dedicated to self hosting it.
Question about self hosting a mail server at home - if my internet goes out at home, all mail sent to me during the outage would be undeliverable, right?
For a paid host, what would be a reliable and cheap option?
You usually can't fully self-host a mail server (like literally in your house) because most residential ISPs block port 25 to prevent spam/abuse. You can use a third party relay service like what Helm offered, but most people "self host" via a cloud provider or a web host.
Email will be retried over the course of like 72 hours. That's why the failed to send email from the host master is usually really delayed. That said your local ISP will likely block the port. You can however ask them for it. They might charge you.
If your email server is offline then mail won't be delivered. The sender's server will retry as other have noted, but how often and how many times varies. Hosting at home, even when possible, is not a great idea in my opinion.
There are endless options for hosting out there, I don't want to name names since I only really have experience with one.
I'm running my own mail server at home. It wasn't all that difficult to set up, using SNM.
The biggest hassle happens when my home IP changes (that's when my router dies for longer than the DHCP lease time), andI have to re-allowlist my home IP in Office365 and whatever the other one was. I get an automated response to the 1st email I send, with instructions how to unblock my IP.
That is not my experience.