finch ☦️ on Nostr: With an email aliasing service, don't you expose your emails through the aliasing ...

With an email aliasing service, don't you expose your emails through the aliasing provider?

Let's say I use protonmail without an aliasing service. In theory the only party that is able to read my emails is me and the person I'm sending emails to (as well as their email provider assuming they don't use encryption).

Is there a way to mask or encrypt the emails being routed through the alias provider?