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Mailcut is an email verification service. Upload a list or check addresses one by one through the web app or the API to find invalid, risky and disposable addresses before you send, so fewer messages bounce and your sender reputation stays healthy. Mailcut is priced in credit packs instead of a monthly subscription: one credit verifies one email address, packs range from 5,000 to 300,000 credits, credits are valid for 12 months, and new accounts receive free credits to try the service. Free tools include an MX record lookup, an SPF, DKIM and DMARC checker, and a disposable email domain checker.

Mailwright is cold email software for founders and small teams: verify the list, draft with the assistant, and send from your own mailbox when you launch.

CleanSignups is a real-time email verification platform that helps businesses prevent fake signups, improve email deliverability, and maintain high-quality customer databases. It validates email addresses before they enter your CRM, marketing platform, or SaaS application by analyzing mailbox validity, domain configuration, disposable email usage, catch-all domains, spam traps, SMTP responses, and overall email quality. CleanSignups is designed for SaaS companies, eCommerce stores, agencies, marketers, and developers who want to improve campaign performance while reducing bounced emails and unnecessary costs. Developers can integrate using a REST API, while businesses can verify individual emails or bulk lists through an intuitive dashboard.

Veridock is an email verification and validation platform that helps businesses improve email deliverability, reduce bounce rates, and maintain clean email lists. It enables businesses, sales teams, marketers, and developers to verify email addresses and identify invalid, risky, and undeliverable email addresses before sending campaigns. With Veridock, users can validate email addresses, detect invalid and disposable emails, identify risky addresses, and improve the quality of their email databases. The platform helps businesses reduce email bounces, protect sender reputation, and improve the effectiveness of their email marketing and sales outreach campaigns. Veridock is designed for businesses, SaaS companies, marketers, sales professionals, and developers looking for a reliable email verification solution to maintain accurate contact databases and improve email deliverability.

Qualisend is an email verification and deliverability platform that protects your sender reputation and helps your emails reach the inbox. Email verification checks every address through syntax, domain and MX, disposable and role detection, typo suggestions, catch-all detection, and a real SMTP mailbox probe. Each address gets a clear verdict: deliverable, risky, undeliverable, or unknown. Catch-all domains are reported honestly instead of being marked valid. You can verify single addresses, upload lists of up to 1 million contacts, or clean lists in place inside 30+ connected tools, including Klaviyo, Mailchimp, HubSpot, and Omnisend. New signups can also be verified in real time. Deliverability tools help you keep your sending infrastructure healthy. You can check SPF, DKIM, and DMARC setup, generate DNS records (SPF, DMARC, BIMI, MTA-STS), analyze email headers, and look up SMTP codes. Blacklist monitoring watches your domains and IPs across major DNSBLs and alerts you when a listing changes. For developers, Qualisend offers a REST API with webhooks and an MCP server, so you can use it from Claude, ChatGPT, Cursor, and other AI assistants. Credits never expire on pay-as-you-go plans, and you can start for free without a card.