You can't unless you have a paid Hotmail account which can be accessed as a POP account.
Microsoft doesn't use an industry standard email account protocol such as POP or IMAP for a free Hotmail account - they use a closed standard with their free accounts with the intention to force people to use one of their email clients.
Microsoft just changed this POP mail item this month - they now allow this with a HOTMAIL PLUS account -
I was finally able to set up my iphone to support my Hotmail Plus email account. I did make a mistake initially which caused it to fail at first so I delete the new account and tried again - here are my steps:
1. Go to Settings
2. Go to Mail
3. Go to Add a new Account
4. Click Other
5. Click the POP button - do not leave it on the default IMAP button (this is where I mady my mistake.
Then fill in these values as the prior poster noted:
NAME: Enter your name here, or some other value.
ADDRESS: Enter your full hotmail email address
DESCRIPTION: Create a description such as "hotmail account"
INCOMING MAIL SERVER
Host name: pop3.live.com
User name: (enter your full hotmail email address)
Password: (enter your password for this account)
OUTGOING MAIL SERVER
Host Name: smtp.live.com
User Name: (enter your full hotmail email address)
Password: (enter the password for this account)
Under the ADVANCED SETTINGS
Make sure incoming and outgoing SSL is 'ON' - Authentication is set to Password
Pleaes note also that my hotmail account has a couple thousand emails in it going back several years so my iphone started inporting the first 200 - then it stopped, so I had to delete many of them, check for mail again and it imported some more, then I deleted more, imported more, and on and on - and it seems to do it by date, so the oldest messages come in first - justs something to keep in mind.
If you don't have a hotmail plus account - it might be worth the $20 a year to get this access if you use your hotmail alot. It beats forwarding messasges to another email to come into your phone or useing some third party like izy that than has your password info.
Is hotmail the only email account you have? Here's an idea... you can have your Hotmail emails forwarded to one of IPhone's suported email apps. This might require you set up a new account, but at least you can get your Hotmails pulled at anytime. If you don't already have it... .mac (dot-mac) has an awesome email system, it requires a yearly fee, but offers a lot. Yahoo mail and Gmail are also supported with the iPhone.
Hotmail is not the only account - I also have a Yahoo and Comcast email accounts on my iphone - so total of 3 accounts - sure makes it easy to check the mail that way
i did some digging and found Microsoft's webpage talking about POP support now being included for Hotmail Plus users...YAY! i was using izymail up until now, but since Hotmail has
finally got back on the POP bandwagon, this removes the need for an intermediary.
I don't believe this is new - not changed just this month.
I'm fairly certain it has always been possible to access a Hotmail Mail Plus or paid account as a POP account with any email client since its inception. Not sure why anyone would be interested in paying for a Hotmail account if you are unable to access the account with any email client - just as with a paid Yahoo Mail Plus or paid account. In typical MS fashion, they followed/copied Yahoo's lead in this regard.