Create Alias email ID to fight against SPAM mail in YAHOO and HOTMAIL/OUTLOOK

Sometime we are compelled to give our email to someone we aren't eager to get any emails as junk. So also when taking part in a gift coupon scheme or while registering with websites. Usually, this leads to our inbox getting spammed. An alias email ID solves the problem.

 In Outlook, there is no need to create a new ID if you have a Hotmail, Live or MSN ID since they work on 1) Outlook. But if you want to create an Outlook alias,
2) Click on 'gear' on top right
3) Go to 'More mail settings'
 Under 'Managing your account', go to 'Your email accounts'. You will see an option 'Create an Outlook alias'.

A new folder for the alias ID will be created. Since the alias ID resides within the primary one, you can't login with it. You can send email from an alias ID, 10 of which can be created per year.

Creating one in Yahoo Mail
1)  Click on 'gear' on top right, go to 'Mail options'
2) Click on 'Disposable addresses'.
3) Create a 'base name', which is common to all disposable addresses, which are created by adding keywords. Like in Outlook, a folder for the disposable address can be created. Keywords and base name can be deleted easily.

Unfortunately Google Gmail service doesn't have such feature to create email Alias