Mailercheck is a great tool to check your email address list. Increase open rates and ROI by eliminating bad email addresses and keeping your email list clean.
The process is straightforward. Create an account on Mailercheck, upload your email addresses to the platform, and perform a check. The manual verification of single addresses is also possible. Or you can make use of an API to automate the process. The result is verification of every email address. Mailercheck can be used as integration with MailerLite, Mailchimp, Activecampaign, Convertkit, and so on.