The difference between E-mail submissions and Electronic submissions:

Email Submissions - Actors send their photos & resume straight to your e-mail address. Unless you have a good sized E-mail account, we won't recommend that.

Electronic Submissions - The actor's photo & resume arrive to your Easy Casting account. Therefore you don't have to worry about your inbox space. It is all on our servers.

Plus, in your account you can file their submissions or delete them.