I have not received the mail yet, please provide the mail's number to me, I can confirm with the Postoffice.
I have not received the letter until now. Please give me the registered number of the letter, so that I can check it up at the post office.
I have not received the mail yet, please provide the mail's number to me so I can confirm with the Postoffice. 虽不是我写的,但改自最好的答案因为他句子不够通顺
I have not received e-mail, please provide your e-mail ID, I went to inquiries about the post office.
I have not yet received your mail, please provide mail number query, I went to the post office.
I've not received your letter yet. Please provide the registered number which I will check at the post office.
有几位没有注意时态问题,在此用个定语从句来表达更好。