We have a long curving driveway with strategically placed landscaping to limit vision from the roadway (boonie country dirt road). The fence towards the gates from the road are angled outwards making it easier to pull a horse trailer or farm equipment through.
Where the fence angles towards the gate my hubby and sons mounted the largest truck boxes they could find against the inside fence uprights on both sides of the gate. We get a lot of deliveries

One for FEDEX and one for UPS. Reason being that they come by at different times of the day. If UPS has already delivered and locked the box, FEDEX could not open the box and would be unable to deliver the package due to the ever-present pack of dogs howling at the gate. Said dogs take their guardian jobs very seriously!
Our mailbox is huge, the biggest one on the market many years ago. It is designed to look like a horse trailer. Gooseneck hugs the upright and mail is delivered through the ramp door. When the door is opened a mule braying is heard throughout the house, thanks to my very creative sons
The reason why the menfolk finally took action, a few Years ago a young man from the Big City was assigned our route for the holiday season. Bless his heart, he really was determined to deliver every.single.package! When he got to our locked gate he simply threw the package over the fence, CLIMBED OVER the fence, and started up the driveway towards the house. He got about halfway when the thundering hooves and howling hounds gave him pause.
Our alarm system went off when he went over the fence so everybody came running. He actually managed to shimmy up into the oak tree before we could get out there, but lost a shoe and was actually crying from fear. My mare could just barely reach the bottom of his sock and the dogs made off with his shoe

Menfolk got things squared away, read him the rules of trespass, and escorted him back to his truck, and he was never ever seen in our neck of the woods again.
So, it's a good idea to have a separate box for deliveries. It's also a good idea to make the delivery process crystal clear to the delivery guys and the company itself to avoid accidents and liability issues.
In His Love
Mich