This is c/selfhosted. This is not the forum to ask for advice about email services you don’t directly control. There are some self-hosted options provided in the comments already. Locking this post to prevent further non-selfhosted discussions.
this post was submitted on 19 Nov 2025
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mailbox.org works for me
Has worked well for me, but keeping in mind that email is probably about the hardest thing to properly self host.
DMARC/DKIM/SPF/MX records have to be set up properly, DNS for auto config and such preferable, and dealing with a myriad of mail IP blacklists (good monitoring service for free: https://mxtoolbox.com/) all come into play.
I suggest stalwart mail, it can run in a binary or in docker, https://github.com/stalwartlabs/stalwart also +1 for mailcow.
I've been on purelymail.com for a couple of years. Receive about 1000 emails a month and send out about 50. Averaging around $0.40/month. They also have a flat rate option of $10/year as long as you don't abuse the system.
You can host a Proton mail bridge to use different apps running on different machines, including phones.
Self hosting e-mail, particularly SMTP, will likely require a static IP from a reputable provider. Mail servers may reject incoming mail based on the reputation of the sending server. You can avoid this by relaying through another SMTP server and configuring your DNS rules to allow that server to send mail on your behalf, but that's not really self hosting anymore.
Check out Infomaniak which has more than just email so could be useful if looking for more of a like for like replacement for O365. If you just want email, somebody mentioned mailbox.org which I have also used and is good.
I can't recommend Purelymail enough. Cheap (10€ per year), and you can have as many accounts and inbox space as you. You can also connect as many domains as you want.
Inleed.xyz has free email hosting with IMAP and POP3 access. You can have as many accounts as you want, but there's a limit of 1GB shared between all of them.
I've been using fastmail for a long time for this now. I've been happy, not to expensive. I'm surprised they haven't been recommended, normally when the question is asked there are a million fastmail recommendations
Fastmail has been doing it for a while, check them out