That's different from what I described above. You don't use a '+' at all in the fastmail email addresses you give out. For example, say with gmail you have na

That's different from what I described above. You don't use a '+' at all in the fastmail email addresses you give out. For example, say with gmail you have name+stuff@gmail.com, with fastmail you could use that if you wanted, but you can also use stuff@name.fastmail.com If fastmail receives mail on that address, it converts it for you as if it had been sent to name+stuff@fastmail.com instead. This happens entirely on the fly so you can make 'proper looking' emails without a '+'