How to reroute emails into a main hub?

I use about 10 different email addresses in order to separate different hobbies and parts of my life. I don't like people being able to track my interests or activities through a single address.

Anyways, I'm looking for an email hub that I can forward all of my addresses to while remaining masked to the people I'm emailing. Currently, if I direct email B to email A and reply to the email in email A, the person I'm responding to will receive that email with the return address of email A. I'm trying to allow the hub to reply with the address that the person actually emailed, rather than my hub's address.

My iPhone did this task fairly well because I could view all of my inboxes in a single application (the default iPhone mail application) and respond to the emails within the actual email, eliminating the need to mask the source of the response. Does anyone know of an application like this that can be operated on a desktop or an emulator to run that app on my computer?

I know this level of secrecy isn't important to many people, I'm just posting here to see how other people have done this (I can't imaging I'm the first to have this desire)

Thunderbird can do that.