Some users prefer to not have threaded/conversation mode turned on in e-mail (e-mails grouped together rather than purely sorted by date). To turn off conversation mode in bmail (webmail):
1) In http://bmail.berkeley.edu, click on the Gear icon, then settings
2) Click on the General tab
3) Scroll down to Conversation View and click on Conversation View off.
4) Scroll to the bottom and click on Save Changes.
UC Berkeley Law School Help Desk