M

Check Mail

Shift+M

Check All Mail (includes all POP accounts)

Ctrl+\

Close Current Tab

N

New Message

Shift+N

New Message in its own window

R

Reply

Shift+R

Reply in a new window

A

Reply All

Shift+A

Reply All in a new window

F

Forward message

Shift+F

Forward in a new window

K

Mark As Read

Shift+K

Mark As Unread

L

Flag

Shift+L

Clear Flag

delete

Delete Item

Ctrl+P

Print

Ctrl+S

Save Draft

Ctrl+Enter

Send Message

V

Turn Reading Pane on and off

Ctrl+[

Navigate through tabs-right to left motion

Ctrl+]

Navigate through tabs-left to right motion

Enter (select a message first, or more than one)

Open message in its own tab

Enter (select a contact first, in Contacts)

Edit contact info

Ctrl+F

Find a word or phrase in a message

F11

Expand window to maximum height

Ctrl+.

Next message (in message tab)

Ctrl+,

Previous message (in message tab)

Ctrl+Shift+End

Skip to oldest unread message

D

Move message to a folder

Esc

Close read-message tab

Ctrl+Shift+C

Start a new chat