I'm planning the transition to self-hosted mail. I did fully self-host mail >10 years ago, so I know how to do it in essence, but I'd like to go a bit softer now, and not host outbound myself, it's just too annoying.
What's your take on that? Do you self-host SMTP as well? Why or why not?
If not, what providers do you use for it (especially in Europe, or even Germany)? How reliable are they? What's the maximum attachment size? What do you pay for it?
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I want to host mail storage myself, mainly.
Posteo, for example, is extremely expensive there. At 0.25 EUR per GB per month that would easily be a three-figure charge per month.
I do have the infrastructure for backing up the data on the server, but archiving email outside of IMAP and managing my data not exceeding 20 GB or something is not what I want. My mail accounts can be hundreds of gigs and that is fine.
My question is mostly about SMTP, which I do not want to do myself.