USA Made custom mailboxes. Shop our modern, mid-century, contemporary, wall mounted mailboxes...
One protects the letters a thief wants to read. The other swallows the parcels a thief wants to grab. They are not the same defense, and most homes that get deliveries need both.
Dream Mailboxes Team
6 min readUpdated August 2026
The short answer
If you get both mail and packages, you want both, and the cleanest way to get there is one unit that does both. A locking mailbox keeps letter mail, checks, and account numbers behind a lock. A package vault takes a parcel a courier drops in and won't let a porch pirate reach it back out. Dream Mailboxes' VaultBox Elite combines the two: a locking letter box up top and a secure drop vault below, so you solve both problems with a single install at the curb.
People tend to treat mailbox security as one problem. It's actually two, and they don't overlap. The threat to your letter mail is quiet: someone flips open an unlocked box and walks off with a check, a new card, or a statement with your account number on it. The threat to your packages is loud and opportunistic: a box sits on the porch in plain view and someone grabs it. A lock solves the first. It does nothing for the second, because a parcel can't fit through a letter slot. Understanding that split is the whole point, because the wrong fix is buying a bigger open box and calling it secure.
A locking mailbox is built around one idea: mail goes in through a slot, but only the keyholder gets it back out. The carrier drops letters into a secured chamber, and the retrieval door stays locked. That's the defense against mail theft and the identity fraud that rides along with it. Checks, tax documents, a replacement debit card, anything with a number worth stealing sits behind a lock instead of behind a flimsy flap anyone can lift.
What a locking mailbox does not do is handle a box from a courier. The same slot that keeps a thief's hand out also keeps a padded envelope from going in. That's not a flaw. It's the trade you make for letter security, and it's exactly why a lock alone leaves your parcels exposed on the ground.
A package vault attacks the other threat. A courier opens a hatch and drops your parcel into a deep, secured chamber. The drop is one-directional by design: a package goes down and in, and a thief reaching through the same opening can't get it back out. The box is off the porch, out of sight, and behind a wall the moment the delivery lands.
This is the piece a locking mailbox can't cover, because parcels are the growth category in home delivery and the easy target. Package theft is common enough that it gets tracked in a national report every year, and the reason it keeps happening is simple: a box left in the open is the lowest-effort theft there is. A vault removes the opportunity entirely. There's nothing sitting out to grab.
The common mistake is reaching for a large open mailbox and assuming size equals safety. It doesn't. An oversized box that fits a parcel also lets any hand reach in and take it, and it leaves your letter mail sitting in the same unlocked space. You've spent money to make theft easier, not harder. Capacity is not the same as security. A box is only secure if what goes in can't come back out to the wrong person, and that takes a lock for letters and a one-way drop for parcels, not just more room.
"A lock stops mail theft. A drop vault stops porch theft. They're two different jobs, and a bigger open box does neither. That's why we build the two into one unit."
— Dream Mailboxes design team
Most homes that get regular deliveries have both problems at once, which is why we built the VaultBox Elite to solve both in one piece. It stacks a locking letter mailbox on top of a package vault below, so the carrier drops letters through the secured slot and parcels through the vault hatch, and you retrieve everything from one locked door on your side. Overall it stands 52" high, 25" wide, and 27" deep, with an interior parcel clearance of 16" wide, 17" deep, and 9.5" high. That's real room for the boxes couriers actually leave, not a token cubby.
Like everything we make, it's USA-made and hand-built, shipped free nationwide, and it can be professionally installed by our own crew, set in concrete with a decorative rock bed, in most of the country. Few competitors will actually come install a vault for you. We do.
| Locking Mailbox | Package Vault | Best for mostCombined VaultBox | |
|---|---|---|---|
| Protects letters | Yes, behind a lock | No; parcels only | Yes, locking letter box on top |
| Fits parcels | No; letter slot only | Yes, deep drop chamber | Yes, 16"W x 17"D x 9.5"H interior |
| Theft resistance | Stops mail theft | Stops porch theft | Stops both, one unit |
| Reach-back-out | Locked retrieval door | One-way drop, no reach-out | Both: locked door and one-way drop |
| Footprint at curb | One small box | One large box | One install does the work of two |
| Best for | Mail-only, few packages | Heavy parcels, mail elsewhere | Most homes that get both |
Start with what actually lands at your curb. If it's letters and the odd small envelope, a lock is enough. If it's a steady stream of boxes, you need somewhere for them to go that a thief can't reach. Most homes are the second case, or both at once, and that's who the combined unit is for.
Our honest read is that if you're already comparing a locking mailbox against a package vault, you probably need the functions of both, and a single combined unit is the cleaner, better-looking way to get there than bolting two boxes to the curb. Not sure which setup fits how you get deliveries? Tell us what lands at your door and we'll point you to the right one.
If you get both letters and packages, yes, because they solve different problems. A locking mailbox stops mail theft; a package vault stops porch theft. The simplest way to cover both is a combined VaultBox, which builds a locking letter box and a drop vault into one unit.
No, that's the point of the design. A package vault uses a one-way drop: the courier sends a parcel down and in, and the geometry keeps a reaching hand from getting it back out. You retrieve it from a separate locked door on your side.
The interior parcel clearance is 16 inches wide, 17 inches deep, and 9.5 inches high, inside an overall footprint of 52 inches high by 25 inches wide by 27 inches deep. That's genuine room for the boxes couriers commonly leave, not a token cubby.
No. An open box that's large enough for a parcel is also open enough for a thief to reach in and take it, and it leaves your letter mail unlocked in the same space. Capacity isn't security. You want a lock for letters and a one-way drop for parcels.
Yes, in most of the country. We offer nationwide professional installation, which few mailbox makers do, setting the unit in concrete with a decorative rock bed. You can also install it yourself. Reach out through our contact page to confirm your area.
We design and build locking mailboxes, package vaults, and combined units in the USA, hand-built and installed nationwide. We wrote this from the security question customers ask us most before they choose a box.
