Mac Mail separating accounts

Hi,


I'm used to using Thunderbird for my mails, but with my new iMac I wanted to give Mail a go.

I like it sofar, the only thing that really bothers me is that I can't seem to change the folder layout on the left.

Right now it's like:

Incoming

• mail account 1
• mail account 2

Sent

• mail account 1
• mail account 2

I'd prefer it to be like:

mail account 1

• Incoming
• Sent
• Concepts
• Trash

mail account 2

• Incoming
• Sent
• Concepts
• Trash

Any way to do this? Plugin, addon of some sort? All solutions are welcome!