I love LibreOffice for documents, but in this case I was specifically trying to set up custom domain email routing (Exchange) for my project. Sadly LibreOffice can't host my MX records haha. If only setting up decent email deliverability was as easy as installing an open-source word processor.
recently i was helping a a friend purchase a custom domain, and signup to a email service; even though i use fastmail, i was surprised to find proton was like 3eur per month (fastmail is 5eur). when my renewal expires, i will probably switch to proton - for 10eur the features are really good;