I want to find out if a certain email address exists. What service could help me to do this?

If you want to find out if a certain email address exists, you should use https://2ip.io/mail-checker/. Simply enter the email address you want to check in the appropriate field and click "check". Our server will attempt to contact the remote server where the email address should be located and check if it exists. However, it is worth bearing in mind that not all email services respond to our requests, so we cannot guarantee the absolute accuracy of the results.

Thanks for the advice! The service https://2ip.io/mail-checker/ was very useful for checking the existence of an email address.