How to send sms programmatically? [closed]

Answer 1

Send an email to the 10 digit phone number @ Carrier's domain name.

Here is a list of the carriers and their domains:

https://en.wikipedia.org/wiki/List_of_SMS_gateways

Answer 2

The articles listed below may be useful:
Are there any free services for sending SMS programmatically?
[Programmatic SMS] [3]
[Free SMS API?] [4]

EDIT Removed first link that has been removed

Answer 3

I use an SMS gateway and it is fairly easy but I did consider this as an alternative because it potentially gave me more control email to sms

Answer 4

The sites that send SMS for free usually use the email interface that most of the carriers implement which allow you to send an email to (for instance) <your 10 digit number>@mobile.att.net

and have it received as an SMS by that phone.