Pick the plan that fits your list size

Mailercloud's email address verifier checks each address against live mail servers via SMTP — not just DNS lookups. Deliverable results are highly reliable. Catch-all domains may show as Risky because their servers accept all addresses without confirming individual mailboxes exist.

No. Mailercloud communicates with the recipient's mail server to check whether the mailbox exists, but no email is ever delivered to the address. Your contacts will never know they were verified.

Lists under 1,000 emails typically complete within minutes. Larger files take longer as each address requires a real-time check against live mail servers. Processing runs in the background — you can navigate away and return to check progress on the Lists page.

One-time purchase credits never expire — buy once and use whenever you need. Subscription credits (monthly or yearly plans) renew each billing cycle. When you hold multiple active balances, your oldest credits are used first.

Mailercloud's email list cleaner supports CSV, TXT, XLS, XLSX, and XLSM files up to 100 MB. CSV and TXT files support up to 1,000,000 addresses per file. Excel formats support up to 100,000 addresses per file.

Yes. Create an API key from your Mailercloud dashboard and submit up to 50 email addresses per request. The email verifier API returns structured JSON with status, reason, and Delivery Score for each address. API requests use the same credit balance as file uploads.

Deliverable emails are safe to send — the mailbox exists and the server is reachable. Invalid emails include non-existent mailboxes, dead servers, syntax errors, and detected typos — remove these immediately. Risky emails include catch-all domains, disposable inboxes, role-based addresses (info@, admin@), and potential spam traps — review these carefully before sending.

Mailercloud email verification starts at $5 for 1,000 credits on a one-time purchase — the cheapest rate available compared to ZeroBounce, NeverBounce, Clearout, and Bouncer at the same tier. Subscription plans start from $5/month. 1 credit = 1 email verified. Active Mailercloud email marketing subscribers receive 100 free verification credits automatically.