Take control of what comes in and out of your home.

How does PostGuard work?

PostGuard uses a Bluetooth connected smart lock system. After a delivery, the mailbox remains slightly open. Once the mailman closes it fully, the lock engages automatically to keep your mail and packages secure.

Does the mailman need an app or key to use it?
Nope! The system is designed so the mailman doesn't need to do anything special. Just drop the mail, close the mailbox like normal, and PostGuard takes care of the locking.

Why does the mailbox stay partially open after pickup?
This is a necessary step in protecting your mail. Leaving it partially open signals the system that the box is ready for delivery. Once it's closed, it locks automatically for security.

Can I open it remotely?
You can unlock PostGuard using the Bluetooth app when you're nearby. Remote unlocking over long distances isn’t supported yet, but it’s something we’re exploring for future versions.

What if someone tries to force it open?
PostGuard uses a durable mechanical lock built by Southco, an industry leader. It’s built to resist prying, tampering, and most common theft attempts.

What happens if I lose my phone?

You can still unlock it with a backup key or by logging into the app on another phone. We recommend keeping a backup access method just in case.

Does it work in all weather conditions?
Yes, the lock and mailbox are designed to withstand rain, snow, and heat. It's built to stay functional year round.

Can I install it on any mailbox?
PostGuard is compatible with most curbside mailboxes. If you’re not sure, send us a picture or model and we’ll help you confirm.

Does it protect packages too?
Yes! Unlike most solutions that only protect letters, PostGuard locks up your packages as well, anything that fits in your box stays secure.

How long does the battery last?
The battery typically lasts between 6 to 12 months, depending on how often your mailbox is used. The app will send you a low battery alert when it's time for a replacement.

Where is the battery located, and how do I replace it?
The battery is attached to the bottom of the mailbox using Velcro for easy access. When it’s time to replace it, just pull it off, swap in a new one, and press it back into place no tools needed.