If you have received/receive my parcel

[Winwin2011]

1. Please let me know when you receive my parcel.
2. Please let me know when you have received my parcel.

I think sentence 1 is correct whereas sentence 2 is wrong. Am I correct?

3. If you have received my parcel, please let me know.
4. If you receive my parcel, please let me know.

I think sentence 3 is correct whereas sentence 4 is wrong. Am I correct?

 

[bhaisahab]

No, you are not correct, they are all OK.