Jut write it the same way you would a letter Also, there are no lits or anything of good celebrity emails because they would just get spammes, which in't fair for genuine collectors or the celebrity

there is no rule how to write a fan letter.
for exmple, i don't write much about me, i don't write my age or something like that.
but i describe why i like the celeb for example which film i most admire

Well there are many celebrities who will get back to you through the mail. The email should be similar to the letter you would send in the mail:

Dear (celeb),
Hi my name is (name). I'm (age).(Any other personal details). I think you're a great (profession). I'm a great fan of your (accomplishments, TV show, etc). If it is all possible, could you please send me an autographed photo?

My Address Is:
(Address)

Thanks,
-(your name)

Just curious, also what exactly do you put in the email when you send it too them?