--- title: "Email Checker: verify syntax, MX & disposable domain" description: "Free email checker: verifies syntax, MX record, disposable and freemail domain of an email address – no sign-up, nothing stored." url: "https://compleadly.com/free-tools/email-checker" lang: "en" alternates: de: "https://compleadly.de/kostenlose-tools/email-checker" en: "https://compleadly.com/free-tools/email-checker" fr: "https://compleadly.com/fr/outils-gratuits/verificateur-email" es: "https://compleadly.com/es/herramientas-gratuitas/verificador-email" it: "https://compleadly.com/it/strumenti-gratuiti/verifica-email" pt: "https://compleadly.com/pt/ferramentas-gratuitas/verificador-email" x-default: "https://compleadly.com/free-tools/email-checker" --- 1. [Home](https://compleadly.com/) 2. [Free tools](https://compleadly.com/free-tools) 3. Email Checker // free tool · email addresses # Check an email address Check a business email address for valid syntax, a reachable mail server, and disposable or freemail domain – free, no sign-up required. // free tool · email addresses ## Email Checker Check a business email address for syntax, MX record, and disposable/freemail domain – no sign-up required. // method ## How to use the Email Checker 1. 01 ### Enter the address Enter the email address to check, for example one from the Email Permutator. 2. 02 ### Confirm privacy consent Confirm you've read the privacy policy – the address is only used for this one check. 3. 03 ### Run the check The tool checks syntax and the mail server's MX record, plus disposable and freemail domain. 4. 04 ### Read the result The table shows five criteria – the mailbox itself is never checked, it always shows "not checkable". // limits ## Limits and privacy ### No mailbox verification The checker never connects to the mail server (no SMTP handshake). Whether a specific mailbox exists stays "not checkable". ### The address is never stored The entered address is used only for the check and never stored or logged anywhere. ### MX lookup has a timeout The mail-server check has a 3-second timeout – for a slow or unreachable server, the result shows "check failed". Who processes the data, on what legal basis and for how long is explained in our privacy policy, section "Free Tools". [Read the privacy policy →](https://compleadly.com/privacy) [Email Signature GeneratorCreate a responsive email signature with logo and social links, free.](https://compleadly.com/free-tools/email-signature-generator)[Email PermutatorGenerate all likely email address variants from a name and domain, free.](https://compleadly.com/free-tools/email-permutator) // faq ## Frequently asked questions about the Email Checker Is the Email Checker free? Yes. You can use it without signing up, with a limit against abuse. Is the entered address stored? No. The address is used only for the one-time check and never stored or logged afterwards. Does the tool verify that the mailbox really exists? No. It never connects to the mail server – the mailbox itself always stays "not checkable". Only syntax, MX record and domain type are checked. What does "disposable domain" mean? The domain belongs to a known provider of temporary, short-lived email addresses – a sign the address is likely not used long-term. What does "freemail domain" mean? The domain belongs to a known free email provider like Gmail or Outlook – a sign of a personal rather than a business mailbox. // compleadly ## Address checked. Now automate outreach. CompLeadly combines personalization, automations and overview in one platform. [Try it free](https://compleadly.com/download)[Book a demo](https://compleadly.com/contact) 10 days free · no credit card ```json { "@context": "https://schema.org", "@type": "Organization", "@id": "https://compleadly.de/#organization", "name": "CompLeadly", "legalName": "CompLeadly OHG", "description": "LinkedIn automation software for B2B sales and lead generation — built in Germany since 2019.", "foundingDate": "2019", "founder": [ { "@type": "Person", "@id": "https://compleadly.de/ueber-uns#person-sebastian-andes", "name": "Sebastian Andes", "jobTitle": "Managing Director · CEO", "url": "https://compleadly.com/about", "image": "https://compleadly.com/images/founders/sebastian-andes-960w.webp", "sameAs": [ "https://www.linkedin.com/in/sebastian-andes/" ], "worksFor": { "@id": "https://compleadly.de/#organization" } }, { "@type": "Person", "@id": "https://compleadly.de/ueber-uns#person-philipp-krapp", "name": "Philipp Krapp", "jobTitle": "Managing Director · CTO", "url": "https://compleadly.com/about", "image": "https://compleadly.com/images/founders/philipp-krapp-960w.webp", "sameAs": [ "https://www.linkedin.com/in/philipp-krapp/" ], "worksFor": { "@id": "https://compleadly.de/#organization" } } ], "url": "https://compleadly.com/", "logo": { "@type": "ImageObject", "url": "https://compleadly.com/brand/compleadly-logo-light.svg" }, "sameAs": [ "https://www.linkedin.com/company/compleadly/", "https://www.facebook.com/CompLeadlyLinkedInSoftware/", "https://www.instagram.com/compleadly/", "https://www.youtube.com/channel/UCNT_aB_ioPgfoAvFclwXvug" ], "contactPoint": [ { "@type": "ContactPoint", "telephone": "+49 2202 1860373", "email": "info@compleadly.de", "contactType": "customer support", "areaServed": "DE", "availableLanguage": [ "German", "English" ] } ], "address": { "@type": "PostalAddress", "streetAddress": "Hauptstr. 26", "postalCode": "51465", "addressLocality": "Bergisch Gladbach", "addressCountry": "DE" } } ``` ```json { "@context": "https://schema.org", "@type": "WebSite", "@id": "https://compleadly.com/#website", "name": "CompLeadly", "url": "https://compleadly.com/", "inLanguage": "en-US", "publisher": { "@id": "https://compleadly.de/#organization" }, "potentialAction": { "@type": "SearchAction", "target": { "@type": "EntryPoint", "urlTemplate": "https://compleadly.com/search?q={search_term_string}" }, "query-input": "required name=search_term_string" } } ``` ```json { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://compleadly.com/" }, { "@type": "ListItem", "position": 2, "name": "Free tools", "item": "https://compleadly.com/free-tools" }, { "@type": "ListItem", "position": 3, "name": "Email Checker", "item": "https://compleadly.com/free-tools/email-checker" } ] } ``` ```json { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Is the Email Checker free?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. You can use it without signing up, with a limit against abuse." } }, { "@type": "Question", "name": "Is the entered address stored?", "acceptedAnswer": { "@type": "Answer", "text": "No. The address is used only for the one-time check and never stored or logged afterwards." } }, { "@type": "Question", "name": "Does the tool verify that the mailbox really exists?", "acceptedAnswer": { "@type": "Answer", "text": "No. It never connects to the mail server – the mailbox itself always stays \"not checkable\". Only syntax, MX record and domain type are checked." } }, { "@type": "Question", "name": "What does \"disposable domain\" mean?", "acceptedAnswer": { "@type": "Answer", "text": "The domain belongs to a known provider of temporary, short-lived email addresses – a sign the address is likely not used long-term." } }, { "@type": "Question", "name": "What does \"freemail domain\" mean?", "acceptedAnswer": { "@type": "Answer", "text": "The domain belongs to a known free email provider like Gmail or Outlook – a sign of a personal rather than a business mailbox." } } ] } ```