Question:-How I can arrange E mails by Conversation?
Answer:-Arrange Your E mails by conversation
Usually, you see e-mail messages in the order in which they arrive. But if you need to read the background of a message, switch to Conversation view to see the rest of the thread.
In Microsoft Office Outlook 2007, click View, click Arrange By, and then click Conversation.
In Microsoft Office Outlook 2003, click View, and then click Arrange By Conversation.