Well, looks like yahoo got scared about google's upcoming new email and upgraded.
Get 100MB free storage
Keep more of the things that are important to you, like special photos, without worrying about bumping up against your storage limit. Yahoo! Mail gives you plenty of space at absolutely no cost. If you prefer to keep your photos in an album, simply upload them right from Mail to Yahoo! Photos, where you get unlimited storage.
Send and receive messages up to 10MB
Photos. Presentations. Documents. Attach them all. Total message size can be up to 10MB.