disable Alt+S shortcut

Jan Czarnecki

New Member
Outlook version
Outlook 365 64 bit
Email Account
Outlook 365 on Win 11.

Thank you for showing how to disable Alt+S shortcut in Outlook.

For those who do not know what the issue is:
In Outlook Alt+S shortcut sends the mail by default. However, when typing Polish, Right_Alt+s inserts diacritic 'ś'. So, when one sends mails in both English and Polish like me, when I forget to switch to Polish language when intending to type 'ś', my unfinished mails is send out. This is VERY, VERY annoying, especially that it happens so often. The only remedy as far as I know is editing the registry. See Avoid Accidentally Sending Messages in Outlook.

It does work, Halleluiah!

Q1: However, it works for lower case s only. But if, e.g., you would like to wish somebody Happy Holidays (in Polish 'Wesołych Świąt'), your wishes are send after pressing Shift+Right_Alt+S.
I can live with that as there are not so many times that I need a capital 'Ś', but it would be nice to kill this shortcut once and for all.

Q2: I am not expert in editing Registry, so my newly added key is named 'default' rather than Del_Alt_S or something similar, and 'rename' is grayed.

Any suggestions on both of the above, please?


Jan Czarnecki

New Member
Outlook version
Outlook 365 64 bit
Email Account
Sorry I misunderstood. I thought the original one should work for both caps and lower case but thought you said it did not.

Capital S is 83
Alt is 16

Right alt *should* use the same key modifier number - at least I can't find a unique one for it.

Thank you once more, Diane.
Special thanks for sending me the link to Group Policy. Following the Note there (on combining modifier keys, e.g., Shift + Alt) I've added another line under the key DisabledShortcutKeysCheckBoxes : New Value REG_SZ 83,20 (20 being the sum of 16 for Alt and 4 for Shift), and to my pleasant surprise it disabled Alt+Shift+S.
Thus, those two lines prevent unintentional sending mail in Outlook 365 on Win 11. It is likely to do the same for other versions of Outlook on Windows but I have only tested it on mine.

Diane Poremsky

Senior Member
Outlook version
Outlook 2016 32 bit
Email Account
Office 365 Exchange
Cool. Thanks for that - I knew about combining codes but had forgotten, thanks for reminding me.
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