关于美国本土快递双休日投递失败的原因

ying

你好，请教Q总：

        我有一个货物通过USPS发货，他们给我发了个邮件显示“We're writing about the order you placed on  
订单号   USPS attempted to deliver your package but was unable to leave the package unattended. ，You can ask USPS to redeliver the package or hold it for pickup at the local post office. To do this, please go to https://redelivery.usps.com/ and use the package tracking number 。。。。。.  If your package was shipped to a PO Box address, it was likely too large to leave in your particular post office box. ”

大概的意思好像是无法投递，这个需要我做什么吗？