Greetings, we are creating a custom email submission form on behalf of our client. This involves sending POST requests to your server directly from our server rather than having users sending POST requests through a form to your server. We just wanted to make sure that you don't flag numerous requests coming from a single host as spam. Could you clarify whether this is the case?
One of the major uses of our API is so that you can create your own custom sign up system and then post to our system. This should not be a problem as long as the email addresses you are signing up have given you permission to email them.
If you have any questions please let me know.