[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Alexandre-P:
Hi!

In Outlook.com, if you go to More mail settings -> POP and deleting downloaded messages, there are two options for POP syncing:

- Don't let another program delete messages from Outlook. (If your other program is set to "delete messages from the server," we'll simply move them to a special POP folder. They won't be deleted.)

- Do what my other program says—if it says to delete messages, then delete them.

Basically, this happens because POP3 is an unidirectionnal way to communicate between a mail client and a mail server. When the client connects to the server, the server sends all the mails he has to the client. Then the server waits for an instruction from the client: either to delete or not the messages the client has successfully received. As POP3 is unidirectionnal, it can't send a "delete" instruction to the server when you delete a message in your client: it's all or nothing. This was useful when storage space in mailboxes was limited -- when you have a local copy of your mails in your computer, then there is no need to keep a copy in the server, and it frees storage space --, but nowadays, most mailboxes have plenty of space, so there is no need to delete mails from the server.

The last option will obey to what your client send to your mail server: if your client tells the server to delete all the received mails, then Hotmail/Outlook.com will delete straightforward the said mails. On the other hand, the first option won't obey your client's instruction -- and if I'm correct, that's the default configuration in Outlook.com; instead of deleting the mails, Hotmail/Outlook.com will simply move them to a special "POP" folder for you to manually decide later what to do with them in your webmail.

Having those informations, you then may want to check what are your actual Email app's configuration about received mails and selecting your prefered option in Outlook.com. But I believe there is a better option for mail syncing.

What I may suggest you is to add your Hotmail/Outlook.com email account as an Exchange ActiveSync account, instead of a classic POP3 account. This way, you have bi-directionnal communication with your mail account -- a per-mail control of your emails --, push notifications -- you will receive mails as they arrive in your inbox --, access to all your email folders -- you are not limited to your inbox only -- and you can sync your contacts' informations in your Android address book with the infos from your email account.

To do that:

1. Open your Email app in Android;

2. Go to Settings;

(2.2 Optional -- You may want to delete your actual Hotmail/Outlook.com account from the app. It's not necessary, and you may want to do it only at the end of this procedure, when you see your Exchange setup working.)

3. In Settings, add a new email account;

4. Enter your Hotmail/Outlook.com email address in the account field and your password in the password field. Then, press Manual setup;

5. Select Microsoft Exchange ActiveSync type account;

6. Click Next -- there is no need to change the default settings;

7. At the Account options screen, again, no real need to change anything, though you *may* want to change Period to sync Email to access older emails. Then, click Next;

8. Type a name for your email account to appear in Email app, then you're done!