View Full Threads in Apple Mail
Many users are aware of Apple Mail's message threading feature, which highlights related email messages within the Inbox. However, many people don't know how to view both sent and received messages within a thread at once. To do so, first enable Message Threading under Mail's Viewing Preferences. Then, Command-click both the mailbox containing your threaded messages, and your Sent box. Now you can view both sent and received messages within the thread simultaneously.
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Enter your account information
Please fill in your name and email address, and set a password. Enter the password a second time to make sure you typed it correctly. Click Create Account to proceed.
You will receive an email message with an activation URL. (If you already have an account, click here to log in.)