---
title: "Ultimate PO Box Blocker \\+ Shopify App Profile"
description: "Stop restricted PO Box orders in real time at checkout, before they're placed. Set up basic protection in one click. Tailor rules by product or collection, with country and shipping exceptions so eligible PO Box orders can continue. Add parcel locker, postal code and custom keyword rules. Review address activity with analytics, product and region reports, and CSV export. For eligible stores, show custom notices on restricted shipping options."
canonical_url: "https://shoplist.co/shopify-apps/ultimate-po-box-blocker"
markdown_url: "https://shoplist.co/shopify-apps/ultimate-po-box-blocker.md"
last_updated: "2026-10-28"
entity_type: "shopify_app"
slug: "ultimate-po-box-blocker"
source: "public Shopify app profile allowlist"
---

# Ultimate PO Box Blocker \+ Shopify App Profile

> Stop restricted PO Box orders in real time at checkout, before they're placed. Set up basic protection in one click. Tailor rules by product or collection, with country and shipping exceptions so eligible PO Box orders can continue. Add parcel locker, postal code and custom keyword rules. Review address activity with analytics, product and region reports, and CSV export. For eligible stores, show custom notices on restricted shipping options.

## Quick answer
Ultimate PO Box Blocker \+ has 25 detected stores in Shoplist. This Markdown profile displays 6 public brand examples; it is not a complete customer list.

## Key facts
- Name: Ultimate PO Box Blocker \+
- Monitoring status: Merchant data available
- Developer: MSM TECHNOLOGIES
- Developer profile: https://shoplist.co/app-developers/msm-technologies
- Shopify App Store URL: https://apps.shopify.com/ultimate-po-box-blocker
- Website: https://msmtech.ca
- Launch date: October 10, 2023
- Shoplist category: Product Reviews & UGC
- Detected stores: 25
- Rating: 4.6
- Review count: 9
- Free trial signal: Yes

## Pricing summary
Pro Monthly Plan: $8.99/month; Pro Yearly Plan: $96.99/year

## Shoplist app-stack sample
Shoplist has public app-stack evidence for 25 brands using Ultimate PO Box Blocker \+. This Markdown page displays 6 of those public brands. Detected stores count storefront evidence; public brands count the brand profiles eligible for this public sample. Stores and brands are different populations, so these counts need not match. This page exposes a small sample so agents can cite Shoplist-native install intelligence without treating the sample as the full dataset.

| Brand | Category or market | Products | Active apps | Shoplist profile |
| --- | --- | --- | --- | --- |
| Logo Brands | Apparel & Accessories | 25,001 | 13 | https://shoplist.co/shopify-brands/logobrands-com.md |
| Dynamic Nail Supply | Health & Beauty | 1,600 | 12 | https://shoplist.co/shopify-brands/dynamicnailsupply-com.md |
| Floris London | Health & Beauty | 160 | 14 | https://shoplist.co/shopify-brands/florislondon-com.md |
| Industrial Shed | Hardware | 25,001 | 9 | https://shoplist.co/shopify-brands/industrialshed-net-au.md |
| Elijah's Xtreme | Food, Beverages & Tobacco | 58 | 17 | https://shoplist.co/shopify-brands/elijahsxtreme-com.md |
| Woolroom | Home & Garden | 320 | 14 | https://shoplist.co/shopify-brands/thewoolroom-com.md |

This table is intentionally a public sample. It does not expose the full brand list, install timeline, contact data, people data, internal scores, crawl provenance, or unstable operational fields.

## Public callouts
- Auto-Block PO Boxes: Block PO Boxes that FedEx, UPS, DHL won't deliver to.
- Eliminate time, effort, cost resolving address issues after purchase.
- Real-Time Validation: Instantly flag PO Box addresses at checkout.
- No manual setup needed for immediate, seamless integration.
## Shopify App Store categories
- Shipping rates

## Data note
Profile updated: October 28, 2026. This is the profile revision date, not a guarantee that every store was checked on that date.
Public snapshot built: 2026-10-30 17:41:25.683353\+00
Detection metrics refreshed: 2026-10-30 14:53:23.662062\+00
Public app evidence date: 2026-10-28 21:32:18.608428\+00
This generated Markdown profile intentionally exposes only public, stable app-profile fields and a small public app-stack sample from Shoplist. It excludes private contact data, people data, internal scores, crawl provenance, full datasets, and unstable operational fields.

## Related links
- [HTML app profile](https://shoplist.co/shopify-apps/ultimate-po-box-blocker)
- [Shopify apps directory](https://shoplist.co/shopify-apps)
- [Shoplist data methodology](https://shoplist.co/data-methodology.md)