Under Managing Your Account, there will be an option to Create an Outlook alias.Then, just choose an alias and a domain, click Save, and you're good to go.You can also do something similar with Gmail, without having to mess with any settings.
All you have to do to access it is type in the address.
You can find instructions for how to do so on Firefox, Opera, and Internet Explorer here, or you can use an add-on for Firefox or Chrome.
Sometimes, you can find login credentials for sites just by searching on Google.
Next time, before you do, try one of these tricks to get around registration instead.
You may just save yourself a bunch of time that can be much better spent than by repeatedly clicking 'Delete.' There are plenty of sites that offer temporary or anonymous email addresses so you can register for a site without giving them your real one.10 Minute Mail gives you a disposable address that expires in ten minutes, but you can extend by another ten as many times as you need to.It may not have all the features of the regular site, but all the content will be there. If you use Outlook, Microsoft gives you the option to create up to five aliases a year for your account.