check email list validity keeps your list clean of invalid & disposable addresses, which reduces bounce rates, improves deliverability & saves you money in data storage fees, costs to send through your ESP or marketing platform, and the cost of lost opportunities when messages are blocked by ISPs or land in spam folders. This is why you should run your list through an email validation tool regularly, and especially before every campaign.

The best email validation services go well beyond simple MX record checks to identify the likelihood of an address being valid or undeliverable. They use a trusted network of millions of records to detect the presence of free email services, disposable domains and other telltale signs of a bad email address. The best email verification tools also give you a breakdown of the results, showing you how many addresses in your list are invalid or risky so that you can remove them before sending your campaigns.

How to Check Email List Validity: Tools & Tips

Real-time validation is the best way to keep your list clean and improve email deliverability and your overall reputation with mailbox providers. This process can be implemented at the time of opt-in, for signups, account creation, downloads or wherever you require an email address. It can be configured to check for syntax errors and typos, reject addresses using free email services or block disposable domains to prevent them from being used for marketing purposes. It can even be integrated with your form to reduce friction and the need for users to click a captcha or type a code to prove that they are not robots.