RAW images are very large in file size so sending them as email attachments doesn't work with gmail/yahoo because they have file size limits. This gets even more difficult when sending 50+ images at a time. What's the easiest way to deliver RAW images to a client so they can download them?
I have created privately shared folders in Dropbox, which works very well. If your customer also has a Dropbox account, the folder shows on his account view as well.
You can also use a temporary file share service like Dropsend, which I use frequently when an image is larger than the Gmail limit.
Both of these services have free as well as paid options. If you pay in either, you can store/send larger files.
All those new fangled kids and their fancy "solutions"... What's wrong with a simple FTP server? Provide the customer with an account, which has security set so they have read-only access to a specific directory containing their data. Quick to set up, easy to use, and can be rapidly automated by both you and the customer for accessing the system.
You could use services such as YouSendIt (free options with limited size). Personally, I really like the Egnyte File Server service. I've been using it at work for almost a year now and it's very good. You can choose to just email your large files to your clients from Egnyte or you can set them up as users on your server (very easy) and have them download and manage their files. There is a ton of options , backup, smart phone app, cloud, etc.
I am using minus these days, because they offer you 10GB for free, no applicable file size limit, you can get up to 50GB space by referring your friends and most of all - Minus allows direct linking to the image files which can save your client from lots of annoyance :)
I am happy with minus. I am not affiliated with it, neither I have shared a referral link here :)