A3E Sender Check vs Deadbolt — Fraud Firewall
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 18, 2026 for A3E Sender Check, Oct 13, 2026 for Deadbolt.
The short answer
- Both list a free plan. Paid plans start at $4.99/month for A3E Sender Check and $9.99/month for Deadbolt.
Head to head
Free
- · Exact DNS records to add, copy buttons
- · Full SPF, DKIM and DMARC check
- · Last 3 checks kept
Pro
- · Automatic daily re-check
- · Email alert when a record breaks
- · Everything in Free
- · Full history of every check
Free
Pro
- · Custom email-domain blocklist
- · Disposable / temporary email blocking
- · Protection Report — fees avoided
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureOrder confirmations and shipping updates are landing in spam or not arriving. Gmail, Yahoo and Outlook reject mail from domains without proper SPF, DKIM and DMARC records — one broken record is enough to lose the sale. A3E Sender Check reads your sending domain's DNS the way mailbox providers do, grades it A to F, and shows each problem with the exact record to add (type, host, value) to copy to your domain host.
Card-testing bots hammer stores with bursts of tiny orders from throwaway emails, checking stolen cards a few dollars at a time. Deadbolt blocks the matching attempt while checkout is still in progress, and logs every catch in plain English so you always know what it did and why. Turn it on in one click, try test mode first, and tune the rules to your store.
- Live SPF, DKIM and DMARC check of your sending domain, graded A to F
- Every problem comes with the exact DNS record to add, with copy buttons
- Daily automatic re-check with an email alert when a record breaks
- Stops bursts of tiny orders from throwaway emails during checkout
- Plain-English activity log of every order it flags — no black box
- Safe test mode to preview what it would block before you enforce it
- Adjustable order-value threshold and your own custom email-domain blocklists
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  A3E Sender Check |  Deadbolt |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | A3E Sender Check | Deadbolt |
|---|---|---|
| App Store rating | Not published | Not published |
| App Store reviews | Not published | Not published |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | A3E Sender Check | Deadbolt |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $4.99/month(ahead) | $9.99/month |
| Longest free trial | 7 days | 14 days |
| Plans listed | 2 | 2 |
Listing
| Measure | A3E Sender Check | Deadbolt |
|---|---|---|
| Shopify category rank | #108 | #86(ahead) |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Sep 25, 2026 | Aug 18, 2026 |
| Languages | 1 | 1 |
| Developer | A3E ECOSYSTEM INC | Lucency |
FAQ
A3E Sender Check and Deadbolt: common questions
- Is A3E Sender Check or Deadbolt cheaper?
- Both list a free plan. Paid plans start at $4.99/month for A3E Sender Check and $9.99/month for Deadbolt. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Oct 18, 2026 for A3E Sender Check, Oct 13, 2026 for Deadbolt; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Oct 18, 2026 for A3E Sender Check, Oct 13, 2026 for Deadbolt. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.