Hi everybody

i've installed a Zimbra Ose server, the name of it is :
mail.domain.X

i've created the domain.X too. Then i've created the domain.Y, in my dns i set the mx mail.domain.X and mx mail.domain.Y.
I'm able to receive the mail to the domain.Y but i can't send the email from it.
Where i'm wrong?

Thanks for the help