We recommend sending images via WeTransfer (https://wetransfer.com), a free file-sharing service enabling the sender to send large size files. Please send the images to firstname.lastname@example.org. Don't forget to include your phone number and as much information as possible. WeTransfer will send you a confirmation that the files were sent and even let you know when we've downloaded your images!
Scroll down to the bottom of this page to see a few examples of what type of images we are looking for to assist us in our evaluation.