Nokia has upgraded its email system on Nokia e75 integrating IM in it. The new Nokia Messaging – E75 IM Beta looks good. It has integrated yahoo messenger and your OVI store accounts. It has more future plans- modern mobile IM client, including background notification, multiple conversation management, status control, and chat log save capability.

Features:

• Chat with your friends on the Yahoo!® Messenger and Ovi communities
• Quickly navigate through multiple conversations across different communities
• Background notifications of new IMs for true multitasking on your phone
• Familiar and integrated community experience -Yahoo-specific emoticons, graphics, and sounds
• Rapidly set status and availability, and login invisibly – choose who you want to talk to
• See your Ovi friends’ avatars and set your own
• Save conversations to remember your chat sessions 

Setup your email account from Nokia messaging email site if you haven’t tried it yet