Been looking into Posteo and I saw the price for additional storage is 0.25/GB/month with a cap of 75GB. I calculated this to seem to be 18.75 (including the initial 4GB) per month. When looking at Proton, Tuta, and Startmail, this feels very expensive compared to their competitors. Is there something I’m missing here? Does Posteo do a bunch of stuff that warrants a high rate for the higher end compared to the very affordable low end?
I self-host mine for free. It breaks very rarely, and when it does, incoming mail gets replayed by the sending server for a coupde of days, so I have time to fix it.