Lots of confusion on Yahoo Mail, so here is a quick guide. (Caveat this is for UK Users)

I'm only going to focus on POP and IMAP access here, as Yahoo via Nokia Messaging is easy to set up. If you have problems I have included the account settings at the bottom for you to check against.

1. Decide if you want POP or IMAP access.
2. Go into Email -> New Account , Wizard will start up.
3. Select Next
4. Select Region (United Kingdom)
5. Select Service Provider (Other)

Scroll down the list past .Mac to the bottom where you will see
Yahoo!Mail
Yahoo! Mail Plus
Yahoo UK

-Select Yahoo!Mail if you want IMAP access
-Select YahooMail Plus if you have paid account
-Select Yahoo UK if you want POP access

press Done

Now Enter details for your account

Name : Your Name
User Name: yourname@yahoo.co.uk
Password : you know what to do
email address: yourname@yahoo.co.uk

The wizard will now create the account and you are done. Make sure you do send and receive to sync your emails. This is not a push email service. If you want push email use Nokia Messaging.

For reference here are the server details that get populated by the wizard.

Yahoo!Mail IMAP Servers
==========================
Account title: Yahoo! Mail
Name: Your Name
User Name: youremail@yahoo.co.uk
Password:you know what to do
E-mail address:your email address@yahoo.co.uk
Incoming server *(IMAP4) imap.n.mail.yahoo.com
secure authentication : unchecked
secure connection :None
Port:143
Outgoing server(SMTP): smtp.mobile.mail.yahoo.com
Secure authentication:Login
username :your username@yahoo.co.uk
Password: your password

Yahoo!UK POP3 Servers

Account Tittle : Yahoo UK
Leave messages on Server: Checked if you only want local delete of files.i.e. if you delete on N900 it will not delete on Server.
Name : Your Name
User Name :your email@yahoo.co.uk
Password:you know what to do
email address:youremail@yahoo.co.uk
incoming server*POP3 : pop.mail.yahoo.co.uk
Secure authentication:checked (greyed)
Secure connection:SSL(POP3S) -greyed out
Port :995
Outgoing Server (smtp):smtp.mail.yahoo.co.uk
Secure authentication :Login
User name : youremailaddress@yahoo.co.uk
Password:you know what to do
Secure connection: SSL
Port :465
use connection specific SMTP Servers: unchecked

Feedback and comments welcome.
Mike C

This isn't working for me yet for the alternate user addresses Yahoo provides for me. I'm in the US, not the UK.

My user name is geneven.rm

My email address is geneven@rocketmail.com

Alternately, my email address could be geneven.rm@yahoo.com

Whenever I try to put in the above information I get a message saying that my user name or password don't match. I have tried several combinations.

I had a similar problem years ago and the developer had to fix his program to make it work.

I can of course access my email on the N900 using the browser.

What can I do if I have a yahoo.com account and I dont want to pay 15 euros to yahoo for POP services ? )

Anyone else in the US having issues with Nokia Messaging the last 12hrs?

It turns out that I have the same problem with a regular Yahoo account. I have had my N900 for just a couple of days.

("regular" means not rocketmail)

I get a rejected login too occasionally, but most of the time it works. Same as my previous phone, actually.

Nokia messaging was a better solution for Yahoo for me but now it is not listed in my N900 email providers

I guess it's not working for clients that don't have co.uk in their email, unless I upgrade to Yahoo Plus and spend some money.

Switch to Mexico, Spanish Yahoo POP is FREE. Maybe you should drop Yahoo a mail and ask why

More mail setup info here,

bun

It should work with free US Yahoo Mail, I think. Googling finds lots of people who have done similar things.