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I know I have to consider about
mail header injection,
and are there more thing that
I need to know before I make form mail thing?
I want mail, and I feel that
I have to set up form mail thing
in my page, but I heard that
mail thing is dangerous if I
do not consider all security things.
1- avoid spam,
use captcha or other thing to prevent spam.
the link talk about it :
Are you human? (or How to prevent spam)
2 – Prevent Duplicate Submissions