People tend to check in during these times:
Do it yourself shipping center available 24hrs/day here... great alternative if you go when they aren't open.
The only nice, courteous person I met with a smile was the kind mail carrier named Frank, I believe? Was not impressed with the service here and they need more than one person for the evening shift.
Outdated and lethargic system, use FedEx or UPS across the street on Carmel Dr instead.
Remember that the last pickup time is 5:15
Always a long wait if u are looking to ship something .. Go to ups!