Denying access to, or use of a system.
Your IP may be blocked due to the lack of reverse DNS, as this usually indicates spam mailings, or due to submitting multiple web sign-ups to your own account. Please note that the web form is for others visiting your website to request information, not for you to add prospects to your account.
An Application Program Interface (API) is used by one program to manage another by remote control. For instance, with an API key you can access GetResponse Web services and manage contacts individually or in bulk operations and provide access to summary campaign results.GetResponse API