I'm just going by what I read in the Seller Protection area.

We'll automatically award you 5-star DSRs in the following categories, when:

• Postage and handling charges: You offer free postage, the buyer chose that option and left you Feedback.
• Communication:
  • You offer 0-1 business day handling time and upload valid tracking information within one business day;
  • At the time the buyer leaves Feedback, there are no communications initiated in eBay Messages* and no pending eBay Money Back Guarantee or PayPal Purchase Protection cases; and
  • There haven't been any requests for contact information between you and the buyer.

  *Best Offers, Second Chance Offers, invoices and invoice requests don't affect automatic 5-star eligibility, even if they contain messages added by the buyer or seller.

We'll automatically remove low (1-star) DSRs for Postage time when you offer 0-1 business day handling time and upload valid postage tracking information within one business day of receiving cleared payment.

We'll automatically remove transaction defects and related Feedback in situations where the transaction problem was not your fault, as outlined in our Defect removal policy. You may request the removal of these types of defects and related Feedback if they aren't automatically removed.