Sending, receiving, and organizing email in Outlook.com
Login Only Alias
You create a new "secret" alias that only you know. You use it ONLY to logon to your account. Then you remove the Sign-In privilege from your existing email alias so it can not be used to logon to your account but can still be used to send and receive email. Now, if all the Bad Guys have is your old alias, they get "We couldn't find a Microsoft account ..." at the very first step of the logon process and can not continue.
1 -- Create a new Log In Only (LIO) alias.
https://account.live.com/AddAssocId
e.g. "JohnDoe.LIO@..."
Write it down! If you forget your LIO alias you will be locked out!
(If you get an error "There's a temporary problem with the service ..." try using a Incognito/Private browser session).
2 -- Make the LIO alias your Primary Alias.
https://account.live.com/names/manage
Do NOT "Remove" anything!
3 -- Log out of your account.
Click on your Initials/Profile Picture at the top right and choose "Sign out"
4 -- Verify that you can login using the new LIO alias.
https://login.live.com/
5 -- Uncheck the Sign-in privilege from your old alias.
https://account.live.com/SignInPreferences
It's now an Email Only (EMO) alias.
6 -- Log out of your account.
Click on your Initials/Profile Picture at the top right and choose "Sign out"
7 -- Verify that you can NOT login using your old EMO alias.
https://login.live.com/
You should see "We couldn't find a Microsoft account_"
8 -- Change your default "Send From" in Outlook to your EMO alias.
https://outlook.live.com/mail/options/mail/forwarding
If you see a [Sign in] button - do it.
Email aliases -> Set default From address
Select your Email Only (EMO) alias.
Notes:
Leakage
- Meeting invites you send still come "From" the Primary alias and there is no way to change it.
- Meeting RSVPs (when you Accept/Decline/Tentative a meeting invite) still come "From" the Primary alias regardless of which alias the invite was sent to.
Limits
Primary Alias Changes
- Microsoft limits primary alias changes to twice per week and 10 times per year to prevent security abuse. If you recently added a new alias, you may also face a mandatory 48-hour to 7-day cooldown before you can set it as your primary.
Alias Creation
- Microsoft limits personal account alias creation to prevent abuse. You can only create up to 2 new aliases every 7 days. Additionally, you are restricted to a rolling annual maximum of 10 new aliases and a total of 10 active aliases on your account at any given time.