Booya!

Currently, email aliases look like this:

izfPb6zIri-booking.com@my-private-domain.com

They are made of 3 pieces:

1. A random string (generated automatically): izfPb6zIri.
2. The address of the website that you are generating the alias for: -booking.com.
3. The domain name used to create the alias: @my-private-domain.com.

The second piece allows Booya! to group aliases in the Browse tab making it possible to manage them easily without requiring a database.