We have a small business and a list of names and mobile phone numbers of customers who have opted in to receive marketing messages from us. We currently use sms text messages. We believe that it is possible to use the new Facebook Messaging API to send these messages even though these people are not FB friends. Our requirement is a web service written in php which, once configured with our FB credentials and the connection is verified as secure, will accept http posts in the format [first name,last name,number,message] then deliver each messages through FB. The messages will each be different as they'll include the first name of the person and volumes will be very small (less than 50 per day), so being flagged as spam shouldn't be a problem (also the recipients already know us) but we'd also like to include a throttling mechanism that will limit the number of messages sent per minute.