Free email verification

What is email verification?

Email verification is a critical process that validates the deliverability and authenticity of an email address. By vetting addresses at the point of entry or within existing databases, businesses can drastically reduce bounce rates and protect their sender reputation a key factor in ensuring messages reach the primary inbox rather than the spam folder.

Email verification is an essential process used to confirm whether an email address is valid and able to receive messages. Businesses commonly rely on it to ensure the accuracy of email addresses collected through sign-up forms or stored in mailing lists, helping to reduce bounce rates and protect their sender reputation with email service providers. Our proprietary email verification technology performs more than 30 checks, including validation of email syntax with support for internationalized (non-ASCII) addresses, verification of domains and DNS records such as MX records, identification of disposable email addresses, execution of diagnostic commands on SMTP mail exchangers, and more. AI is used to accurately evaluate each step and generate detailed email verification reports.

What is a bounce?

A bounce occurs when an email cannot be successfully delivered to its intended recipient. Bounces happen for different reasons and are generally categorized as soft bounces, which result from temporary delivery issues such as a full mailbox, and hard bounces, which indicate permanent delivery failures. Our email checker helps reduce bounce rates by detecting and removing invalid or non-functional email addresses from mailing lists before email campaigns are sent. Reducing bounces is essential for maintaining a strong sender reputation, as repeatedly sending emails to invalid addresses can harm how email service providers perceive your sender status and may result in emails being flagged as spam or not delivered.

• Soft bounces – temporary issues
• Hard bounces – permanent failures

What is sender reputation?

Sender reputation refers to the overall track record of an email sender's behavior, particularly in terms of sending practices and user engagement: a sender with a positive reputation is more likely to achieve successful email delivery to recipients' inboxes, while a poor reputation may lead to emails being flagged as spam or failing to reach the intended recipients. When assessing sender reputation, email service providers (ESPs) consider various critical factors, including bounce rates, spam complaints, email volume, the implementation of proper authentication mechanisms (such as SPF, DKIM, and DMARC), and the quality of content. Using our email tester allows to remove bounces and keep your mailing list clean, improving your sender reputation.

Is Cloudtoco integrated with my ESP / CRM / database?

CLoudtoco integrates with more than 6,000 apps and services, including most CRMs, email marketing platforms, databases, cloud storage solutions, transactional email services, spreadsheet applications, forms, contact managers, and more. To ensure easy and user-friendly integration, CLoudtoco is officially available on Zapier, allowing users to connect their applications to CLoudtoco’s email checker through a simple point-and-click interface. CLoudtoco is also integrated with the Pipedream low-code platform, enabling IT professionals and developers to incorporate its email validation capabilities into automation workflows using just a few lines of code. In addition, CLoudtoco provides a direct integration with Google Sheets, making it possible to verify email addresses within a spreadsheet with a single click.

How can I verify email addresses in bulk?

Cloudtoco simplifies the bulk email verification process through its user-friendly dashboard: users can effortlessly upload and verify lists of email addresses, checking for typos, invalid entries, undeliverable addresses, and risky emails like disposable emails, honeypots and spamtraps. To initiate the email verification, upload your chosen mailing list to our dashboard in one of the supported formats (CSV, Excel, or plain text); once our email verifier finishes the mail list cleaning process, selectively download deliverable emails, focus on invalid or risky ones, or pick items based on their classifications and statuses among the 40+ supported by Verifalia. Our email validator can identify the most elusive disposable email address providers, such as EmailOnDeck, and can check even the most challenging mail exchangers, including Yahoo!

How can I check email addresses on my website?

Cloudtoco offers two practical ways to verify email addresses directly on your website. The first option is a free email verification widget that can be easily embedded into any HTML page or form. It validates email addresses in real time as users enter them, ensuring that only valid and deliverable addresses are accepted before submission. The widget works with most landing page builders and requires no development skills to set up. For developers, Cloudtoco also provides a real-time email validation API. This API enables the verification of individual email addresses as well as bulk validation of mailing lists from any application, offering a flexible and seamless way to integrate Cloudtoco’s email checking capabilities into software or platforms.