GMail lets you setup mail forwarding of all incoming mails to a designated account and label them accordingly. It also lets you choose different email addresses

GMail lets you setup mail forwarding of all incoming mails to a designated account and label them accordingly. It also lets you choose different email addresses to put in the From: header if you set this up. This way, you get all benefits of multiple accounts without all the hassle connected with signing in and out many times. I have _many_ different email addresses, but they all (except of the one at work, for obvious reasons) forward the mail to main one, which labels them for me to know their origin.