

100% this! Proton pass is convenient, but their email forwarding locks you into their ecosystem, and they limit your aliasing for your own custom domain. I started using it, and its nice, but I wish I knew about annonaddy before. I’d prefer making aliases using a custom domain so if i have to respond with a forwarded alias I can manage a way to reply from it, plus if I ever decide to leave proton, its not a road block. Sure you can usually change email addresses on sites, but may end up being a ton of work depending how many aliases you have, and how annoying the site makes it.
Apparently proton pass has a custom domain function I was unaware of until now. Looks like you have to go into settings > aliases. There is an ‘add custom domain’ button, assuming you need the domain added to your proton account with a catchall address maybe?