@ ja princess
 
To guide you in setting up your MSN account in your iPhone, go here:
 
http://windowslivehelp.com/solutions/settings/archive/2009/03/30/how-to-setup-hotmail-on-iphone.aspx 

@ Xtree
 
Make sure first that your Hotmail account is properly configured in your iPhone using the correct settings.  You may refer to the link below:
 
http://windowslivehelp.com/solutions/settings/archive/2009/03/30/how-to-setup-hotmail-on-iphone.aspx
 
If the correct settings have been entered and the issue persists, get in touch with the Microsoft Mobile Support Group for more help.  You can reach them by going here:
 
https://support.live.com/default.aspx?productkey=wlmobile 

I am having trouble getting my iphone to sync with my msn email account.  Any suggestions?

@ Mattg5

Please refer to Rosalie’s reply to Xtree.

I've had trouble with mine. What I had to do was, delete the account on my iPhone and then to re-add it.

Put in your name in where is says name obviously, and then your email address into the address and description boxes.

For incoming mail server put in pop3.live.com followed by email address and password.

For outgoing, put in smtp.live.com.

That should be all you have to do. If it doesn't work, then re-check everything is typed correctly. If it still doesn't work then I have no more answers...

Hope that's been helpful.