No. The mail reaches the post office for delivery THAT DAY at 4am. Mail carriers come in a couple hours later and take it out for delivery before the retail unit is open. No mail is stored at the post office. You can put your mail on hold at www.usps.com
The above answers are correct.
No, the only time mail is held, is if it's sent certified, and no one is home to sign for it. But regular mail, no.
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