Hello, the electronic contract is also valid. According to the situation you described, the court will see who has greater probative power according to the rules of evidence. The evidence in this case should be the proof of payment for goods, and the documents of mailing goods can prove the facts, and there will not be much difference. There is evidence in the lawsuit, and it will be successful if the evidence is prepared. I hope it helps you, and I wish you all the best!