Yahoo! Mail Hotkeys - Keyboard Shortcuts

c Compose Allows you to compose a new message. 
/ Search Puts your cursor in the search box.
k Move to newer conversation Opens or moves your cursor to a more recent conversation.
j Move to older conversation Opens or moves your cursor to the next oldest conversation.
n Next message Moves your cursor to the next message.
p Previous message Moves your cursor to the previous message.
o or <Enter> Open Opens your conversation. Also expands or collapses a message if you are in 'Conversation View.'
u Return to conversation list Refreshes your page and returns you to the inbox, or list of conversations.
y Archive*
Remove from current view
Automatically removes the message or conversation from your current view.
x Select conversation Automatically checks and selects a conversation so that you can archive, apply a label, or choose an action from the drop-down menu to apply to that conversation.
s Star a message or conversation Adds or removes a star to a message or conversation. Stars allow you to give a message or conversation a special status.
! Report spam Marks a message as spam and removes it from your conversation list.
r Reply Reply to the message sender. 
a Reply all Reply to all message recipients. 
f Forward Forward a message. 
<Esc> Escape from input field Removes the cursor from your current input field.
d Delete message(s) Why Gmail doesn't have this shortcut?

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