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Free email checker and email verification with 99.9% accuracy. Reduce bounces, protect sender reputation. 100 free email verification credits daily. | Puzzle Inbox provides pre-warmed Google Workspace and Outlook 365 inboxes to help agencies and sales teams scale cold email outreach fast. Every inbox comes fully configured with SPF, DKIM, and DMARC — ready to send straight away. Trusted by 1,200+ clients with over 70,800 active inboxes deployed, starting from $0.35 per inbox. |
Bulk Email Checker, SMTP, Email Spam Checker | cold email, cold email inbox, warmed inboxes, google workspace inboxes, cold email infrastructure |
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Is an AI-driven multichannel outreach platform that reaches prospects where they're most active while keeping every message personal, timely, and effective.

Free email verifier & checker to validate email addresses instantly. Reduce bounces and verify emails in real time.

MTN Email Verifier is a high-performance tool for ensuring that your email communications reach the right inboxes every time. With the rise of email marketing and automated outreach, maintaining a clean list of deliverable email addresses is crucial. MTN Email Verifier combines syntax validation, domain checks, and server-level SMTP verification to deliver a reliable, real-time solution.

Sidemail is an all-in-one email delivery platform for startups that makes sending emails simple. It has everything for delivering and managing emails – email API, transactional emails, email marketing and automation, contact management, no-code email editor, email templates, subscribe forms, and more. Perfect for teams & developers that want reliable deliverability without the bloat. We're based in the EU and GDPR compliant.

Get US-IP Google & Microsoft Workspace accounts from $2.5. 95% inbox delivery. Works with SmartLead, Instantly, Lemlist, SalesForge, Warmy & more.

Hypermail is a cold email marketing solution. We handle all aspects of email marketing. Whether it is a self service account or if need us to manage the whole campaign. We offer an easy to use platform, with an API, and built for resellers/whitlelabel. In addition, we stay up to date with latest technologies, and offer built AI features to improve your campaigns. Secondary offerings include, email list verification, Smart Relay which allows you to connect multiple esps via SMTP to send your campaigns, B2B data, and last SMS/MMS for political campaigns.

Detect temporary emails with explainable AI. 95%+ accuracy, <500ms API, governance tools, and appeals management. 10 free email checks. Start now.

Get a free disposable email address with Temp Mailin. Instantly receive emails, block spam, and protect your privacy. No registration needed.

MIA (Marketing Inbox Assistant) uses AI to automatically process marketing email responses, instantly routing high-intent leads to sales and handling compliance requests like opt-outs. It enriches your database from email signatures and out-of-office replies while supporting 60+ languages. MIA integrates with major platforms like Marketo, HubSpot, Salesforce, Google, and Outlook to eliminate manual inbox management.

Protect your domain with Dmarclytics. Run free DMARC, SPF, and DKIM checks to stop spoofing, enhance email authentication, and improve deliverability with powerful monitoring tools.