Verify addresses before sending or saving them. Up to 99% accuracy through DNS and SMTP. Data stays in your account and is used only for validation.
Try one email free — no signup. Complete the captcha to verify.
Clean your email list(s) with email verification software in three simple steps:
Sign up for free and get 100 verification credits to start.
Upload CSV, XLSX or paste emails. We verify each address in real time.
Export valid, invalid, risky and catch-all results as CSV, XLSX or TXT.
Send email campaigns with confidence. Join mails.expert — the best email verification service available.
Comprehensive checks including MX records, SMTP verification, domain reachability, blacklist monitoring, and more — all in one platform.
Upload CSV, XLSX or paste emails. Results: valid, invalid, risky, catch-all, unknown. Download clean list instantly.
Detect catch-all domains that accept any email. Flag disposable and role-based addresses (admin@, info@).
Integrate verification into your apps. Single and bulk endpoints with Bearer token auth. Full API documentation included.
You want results from your email campaigns. We help you achieve them.
Industry-leading verification accuracy powered by multi-layer checks: format, MX, SMTP, domain reachability, and more.
Verify thousands of emails per minute with our optimized bulk processing pipeline.
Your data is encrypted at rest and in transit. We never store or share your email lists.
RESTful API with comprehensive docs, curl examples, and Bearer token auth. Integrate in minutes.
Useful for performance marketers, outbound sales teams, and founders who care about deliverability and ROI.
After cleaning our list with mails.expert, bounce rate dropped almost by half and open rates improved in the very first campaign. We used to see reputation drops after larger sends, and now our deliverability is much more stable from launch to launch.
Upload 10k–100k emails at once
Identify domains that accept any address
Flag temporary email providers
Detect admin@, info@, support@ addresses
REST API with curl examples and docs
Download results as CSV, XLSX or TXT
Email verification is the process of checking whether an email address is valid and configured to receive email messages. It includes format validation, domain and MX record checks, SMTP verification, and detection of disposable, role-based, and catch-all addresses.
Sending to invalid emails increases bounce rates, damages your sender reputation, and can get your domain blacklisted. Email verification helps you maintain a clean list, improve deliverability, and protect your sending infrastructure.
Email validation typically refers to checking the format and syntax of an email address. Email verification goes further — it checks whether the mailbox actually exists and can receive messages by connecting to the mail server.
We recommend verifying your email list before every major campaign, and at least once per quarter for your full database. For real-time verification, use our API to validate emails as they are submitted on your forms.
mails.expert achieves 99.6% accuracy through multi-layer verification: format checks, DNS/MX lookups, SMTP mailbox verification, catch-all detection, disposable email filtering, and known provider intelligence.