* Tense: The past perfect tense ("had sent") suggests the sending happened before another past event. If you're just stating a fact about the package being sent, the simple past tense is more natural: "You sent it through DHL yesterday."
* Context: The sentence is missing information about who "you" refers to. It's unclear who sent the package.
Here are some better ways to phrase it:
* "You sent it through DHL yesterday, right?" (This is a question, but sounds more natural in conversation.)
* "I understand you sent it through DHL yesterday." (This clearly states the recipient of the information.)
* "The package was sent through DHL yesterday." (This avoids ambiguity about the sender.)
Choose the sentence that best fits the specific context of your conversation.