Since many English verbs change meaning depending on which particle follows them, it's a good idea to memorize the meaning and use of particle-verb pairs rather than just verbs alone. In this case the pair you want is "to send to". "To send at [something]" has a different meaning and is not as common.
He sent the book to my house
They will send the package to us by overnight express mail
As FumbleFingers mentions, there are some informal practices that determine the order of adverbs in a sentence. My personal preference is to pick the most important information first, and then the rest in decreasing order of importance. So with "send to", after stating the what, I would first state the where, then the how, when, why or other information.
He sent [the book] [to me] [by bus]
is more natural than this:
He sent [the book] [by bus] [to me]
Of course this all depends on the context.
Also, as mentioned in the comments, your use of "has sent" is incorrect. See this ELL question for more information on when and how to use the perfect tenses.
Side note: Send is a flexible verb that has varied meanings depending on which particle is used. Please look up the definitions of "send out", "send over", "send up", and "send off", all of which have meanings that you might not be able to intuit from other uses of "send".