问题
Are there any sites that offer the ability to send SMS for free?
How do they do it?
How am I able to send SMS programmatically?
回答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
回答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
回答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
回答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.
来源：https://stackoverflow.com/questions/1061752/how-to-send-sms-programmatically