Email verification that keeps your lists clean

Syntax, the domain and its MX records, disposable and role-based addresses, spam-trap risk signs (newly registered, parked or blocklisted domains, machine-generated addresses), and the mailbox itself through a live SMTP conversation with the receiving server, and whether the domain is catch-all.

No. The SMTP conversation stops before any message is sent, so the people on your list never receive anything from us.

Credits from packs and the 100 welcome credits never expire while your account is open. The free allowance of 200 checks renews on the 1st of each month, and a plan's daily credits renew every day; unused free or daily credits do not carry over.

Real spam-trap addresses are kept secret by the anti-spam organisations that run them, so no service can list them all. We look for the signs that make an address likely to be a trap or a bot: a domain registered in the last few weeks, a parked or for-sale domain, a domain on a spam blocklist, or a machine-generated address. Such addresses are marked risky with the reason, so you can leave them out of your sends.

Report it from the list's page: paste the addresses or upload the bounce report of your sending tool. We check each one again right away, and when the mailbox really no longer exists you get its credits back, as credits that never expire. The Refund Policy has the limits.

Each finished list shows the share of it expected to bounce if you send it now, for the whole list and for its safer parts (Safe only, Safe with role addresses, with catch-all addresses), next to the level of about 2% where many sending services start warning or pausing accounts. One click downloads the part we recommend.

One credit per address, with every check included: the catch-all check too, which finds domains that accept every address and hide whether a mailbox is real. Duplicates are removed before charging, and addresses you checked in the last few days are free.

Some mail servers answer "try again later" (greylisting) or do not answer at all. In bulk lists, MailQuell tries those addresses a second time a few minutes later, for free. What still has no answer stays "unknown": the address may be fine, but we could not confirm it. Checks that fail because of a problem on our side are refunded.

No. Duplicates in an uploaded list are removed before the check, ignoring upper and lower case, and only unique addresses use credits. You can switch this off if you need one result per row.

No. If an address in a new list was verified by your account in the last 20 days, its result is copied for free instead of being checked again (addresses with no clear answer are checked again). You see how many before you start, and you can switch it off to check everything again.

Your uploaded list is deleted when the task finishes, and the per-address results 20 days later. Data is hosted in the United Kingdom, which the EU recognises as protecting personal data as well as its own rules do, and is never sold or shared.

Describe what you sell and your ideal customer, add up to 6 criteria, and MailQuell reads the public website of each company in your list and tells you which ones are a good fit, with a score per criterion. Contacts at the same company count once (1 AI credit per website); websites that cannot be read are free. Only website text is sent to the AI, never the addresses or names in your list. Every account gets 50 AI credits a month, plans include more.

Yes, within 14 days of purchase if no more than 20% of the credits have been used. See the Refund Policy for details.

No. Sign up with your email to get 100 welcome credits and 200 free checks every month.