iphone 4s, i cant email photos "actual size" they only go through with "small" setting, V Frustrating!

hi, whenever i try to email a photo ive just taken my 4s wont deliver the email when i send it "actual size" im on Orange, and its the same even when im connected to wifi, it doesnt show any errors its just the recipient never recieves them

hope you guys can help

kel