Regular mail is not delivered on Sundays, so please don't ask to receive it!
If you are going to urge the other party to receive it, why don't you make an effort to send it in 1~2 days yourself?
It arrived safe and sound!
However, it was postmarked two and a half days past the date of posting. I was concerned because I was notified that this might have delayed the evaluation. I would have appreciated it if you could have told me honestly that you would be late if you were late. I hope to have another opportunity