Verify your list with EmailShield
EmailShield is a list cleaner. Before you send, it
checks every address on your list and removes the ones that don’t exist, bounce or are risky. Think of it as a
spell-check for emails. It’s a sister product of Maildeck, at emailshield.co.
Verifying your list is the cheapest way to protect the domains your inboxes live on.
Where it fits in your stack
Section titled “Where it fits in your stack”Every cold email setup has four parts. EmailShield is part 4, the last check before anything is sent.
| Part | What it does | Tool |
|---|---|---|
| 1. Infrastructure | The inboxes and domains you send from | Maildeck |
| 2. Sequencer | Sends your campaigns and follow-ups | Instantly, Plusvibe, Smartlead, EmailBison, Manyreach |
| 3. Leads & enrichment | Finds the right people and their work emails | LeadSonar |
| 4. Cleaning & verification | Removes bad and risky addresses before you send | EmailShield |
Why verify before you send
Section titled “Why verify before you send”When you email an address that doesn’t exist, the email bounces: it comes back undelivered. Email providers like Microsoft and Google watch your bounce rate. A lot of bounces tells them you’re sending to a list you didn’t check, which is what spammers do. Your sender reputation drops, more of your emails land in spam, and in bad cases the domain ends up on a blacklist (a public list of senders that many mail servers refuse or filter).
The domain is the expensive part to lose: it took weeks of warmup to get it ready to send. Verifying the list first costs far less than replacing a burned domain.
How it helps
Section titled “How it helps”- Fewer bounces, so your domains stay healthy and out of spam
- You only pay to send to people who can actually receive it. Every bad address wastes a slot in your inboxes’ daily sending limit.
- It also watches your domains for blacklists and warns you early
What it does
Section titled “What it does”- Multi-port SMTP verification on every address (it asks the recipient’s mail server whether the mailbox exists, without sending an email)
- Catch-all, disposable and role-account detection (see List hygiene for what these are)
- Bulk list uploads with downloadable results
- Blacklist monitoring for domains and IPs, with alerts
- DMARC report analysis and deliverability monitoring
- Inbox and spam placement testing
- Clean REST API and webhooks for your own stack
How to use it in your workflow
Section titled “How to use it in your workflow”-
Build your list. With LeadSonar, emails already come verified by EmailShield. If you got the list somewhere else, go to step 2.
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Upload the list to EmailShield and let it check every address.
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Download the results and keep only the addresses marked safe. Decide what to do with risky ones such as catch-alls (see List hygiene).
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Import the clean list into your sequencer and start your campaign.
Getting started
Section titled “Getting started”EmailShield has its own account and its own pricing, which you’ll find on its site. In the Maildeck app it’s listed in the sidebar under Verification.