Hotmail
Probably the most used email service available on the internet. If you don't have an email account then you can open one here.

America On-line (AOL) (US site)
America On-line (AOL) (UK site)
Have your own AOL account? Then you can check and send your mail using Netmail.

Yahoo
If you have a Yahoo email account then this is where you check it. You can also open a new account here. Remember to log out at the end though.

Readmail
If you know your email address and password, but your service does not give you remote access then Readmail might be the way for you to go.

Mail2Web
Check your mail through the web if you know your username, password and pop server address.

Ireland.com
Check you email address at Ireland.com.