Mail Problem

[pentium31059]

I have a Joomla site which doesn't send activation mail.
I tried "php mail" ,"smtp" and "send mail" but they don't work.
What do you think about these problems?

I am waiting your answer...

Thanks..

 

[vv.bbcc19]

Do you get any specific error?

 

[pentium31059]

No any spesific error.Now I am using phpmail.But it isn't sending