Why do emails not load images directly
问题 Email providers like Gmail,yahoo,hotmail do not load images in the email directly. These services require you to allow the images to be laoded. Why do they do this? Is it to prevent XSS/CSRF? 回答1: Two reasons - Privacy and CSRF. Privacy It allows the sender to figure out whether I have opened the email or not, without my knowledge . Spammers can figure out whether their "marketing" campaigns have had any impact or not. CSRF For CSRF to work, the victim has to click a link or visit the