Yeah. Not sure it will be a long term solution. But needed something for now while I migrate away from mailbox.org. Thankfully I didn't use the mailbox.org aliases much so it is pretty simple to switch providers.

I ended up just doing skiff free version for the time being. It is allowing me to use custom domain and it gives me a couple skiff aliases I can use. Only thing I don't like is it forces me to use the app and no notifications without Google play services.

migadu does seem like a good option. Curious what you have chosen? I am also looking at fastmail standard to replace simplelogin email aliasing since it would be the same price as simplelogin + migadu/runbox.

Did not know this... Also currently on the 1 EUR plan since it was the best bang for buck that included custom domains. Might start looking into other options when my plan runs out