Claws Mail

Main window

Mark message as unread

↑   Shift + !

All hotkeys for Claws Mail

Compose window
Move a previous line

Ctrl + P

Compose window
Close

Ctrl + W

Main window
Synchronise folders

Ctrl + ↑   Shift + S

Compose window
Save

Ctrl + S

Main window
Exit

Ctrl + Q

Compose window
Copy

Ctrl + C

Compose window
Select all

Ctrl + A

Compose window
Move a character forward

Ctrl + F

Main window
Search folder...

↑   Shift + Ctrl + F

Main window
Toggle threaded display

Ctrl + T

Main window
Go to next mail in Message List. The Down arrow does the same.

N

Main window
Go to next mail in Message List. The Down arrow does the same.

Main window
Go to previous mail. The Up arrow is a synonym.

P

Main window
Go to previous mail. The Up arrow is a synonym.

Main window
Go to next unread mail.

↑   Shift + N

Main window
Go to previous unread mail.

↑   Shift + P

Main window
Go to other folder…

G

Compose window
Delete line

Ctrl + U

Compose window
Delete a character backward

Ctrl + H

Main window
Toggles the message view panel visibility. When invisible, Message List expands itself to fill the full window height and  more summary lines are displayed

V

Main window
Positions the cursor on the Quicksearch field, also opening the Quicksearch panel if needed

/

Main window
Update summary

Ctrl + Alt + U

Compose window
Insert file

Ctrl + I

Main window
Get mail from all accounts

↑   Shift + Ctrl + I

Compose window
Attach file

Ctrl + M

Main window
Reply

Ctrl + R

Main window
Reply to all

↑   Shift + Ctrl + R

Compose window
Wrap current paragraph

Ctrl + L

Main window
Forward message

Ctrl + Alt + F

Main window
Move...

Ctrl + O

Main window
Copy...

↑   Shift + Ctrl + O

Compose window
Delete a character forward

Ctrl + D

Main window
Empty all Trash folders

↑   Shift + D

Main window
Mark message

↑   Shift + *

Main window
Unmark message

U

Main window
Mark message as unread

↑   Shift + !

Compose window
Open address book

↑   Shift + Ctrl + A

Main window
Execute

X

Compose window
Toggle auto wrapping

↑   Shift + Ctrl + L

Main window
Toggles menu bar visibility

Ctrl + F12

Main window
Full screen

F11

Compose window
Send

Ctrl + ⤶ Enter

Compose window
Send later

↑   Shift + Ctrl + S

Compose window
Insert signature

Ctrl + G

Compose window
Undo

Ctrl + Z

Compose window
Redo

Ctrl + Y

Compose window
Cut

Ctrl + X

Compose window
Paste

Ctrl + V

Compose window
Move a character backward

Ctrl + B

Compose window
Move to end of line

Ctrl + E

Compose window
Move a next line

Ctrl + N

Compose window
Delete to end of line

Ctrl + K

Compose window
Wrap all long lines

Ctrl + Alt + L

Compose window
Edit with external editor

↑   Shift + Ctrl + X

Similar combinations for other applications