Desperate need of help,for iPhone!

I recently jailbroken my iPhone with iliberty.now I can’t access me email because it says the user name or password for“IMAP.apple.mail.yahoo.com is incorrect.what should I do?also I’m trying to downlad my software back to 1.1.3, so I can customize my apps and iPhone,in the installer it says I need the firmware 1.1[123]. How can I get that,can anyone please help out?thank you