Now there’s almost nothing that’s too big to mail. When you’re signed in to iCloud, Mail Drop lets you send large files like videos, presentations, even a folder of images without having to worry about your service provider’s limitations. Just drag your attachments, up to 5GB total, into your mail message, and Mail Drop handles the rest. If your recipients use Mail in OS X Yosemite, they’ll receive the attachment just as they do today. If they use another app or webmail, they’ll receive your email with a link to download it. There’s no charge to use Mail Drop. And it works no matter which email service you use, including Gmail, Yahoo, and Microsoft Exchange.