You mean Latin[1]. While "nota" is "note" in Spanish, "tuta" is not a word.
OTOH, €8/mo is peanuts anyway.
So yeah, I probably don't fall into the normal category here, a handful of friends & family users and a ton of domains. Protonmail/Fastmail would cost me at least 40 EUR per month, and that's a rough estimate, could easily be 80.
I'm planning to redo this soon (been a few years) and I'm as of yet undecided if I just do it manually again (like I do every 3-5 years) or if I'll use some template ala sovereign, mailinabox, mailcow, modoboa.
Also check this thread from last year: https://news.ycombinator.com/item?id=16238937