[atomwaffel]

Fastmail also lets you use wildcards and catchall addresses, giving you infinite email addresses whenever you need them, with no way to tell what “base address” they resolve to internally.

For example, my Twitter address might be [e-mail], my Google address [e-mail] and so on. All of those go straight to my inbox unless I decide to set up individual filters for them.

The downside is that I can’t easily migrate to a service that doesn’t support this.