I use Microsoft Outlook at work and have never purposely used the Ctrl+Enter keyboard to send an email. However, I am a fairly fast typist, and sometimes don’t let go of the Ctrl key quick enough after pasting something into an email before pressing Enter for a new line, the result being a half-finished email getting sent prematurely.
Fortunately there’s a registry hack to disable this annoyance once and for all:
[HKEY_CURRENT_USER\Software\Policies\Microsoft\ Office\11.0\Outlook\DisabledShortcutKeysCheckBoxes] "CtrlEnter"="13,8"
If you’re using Word as your email editor, add this too:
[HKEY_CURRENT_USER\Software\Policies\Microsoft\ Office\11.0\Word\DisabledShortcutKeysCheckBoxes] "CtrlEnter"="13,8"
Presumably, if you’re using a different version of Office, you will need to replace 11.0 with the correct version (10.0 for Office XP, 12.0 for Office 2003, etc.)