When someone opts in to receive automated messages by texting your keyword to 292929, they will receive a standard auto-reply confirming they've opted in:
If you'd like to set a custom auto-reply, you can set it by going to Contacts-->Customize Your Join Reply.
Here you can preview your message and set it accordingly.
Here you can set a custom reply when someone opts in to receive your group texts. Pretty simple, right? This is a great tool if you'd like the recipient to contact a specific phone number once they've opted in, receive a special message, or even direct the recipient to a website!
Call-Em-All's automated messaging service allows you to send a voice broadcast, group text, or both to every phone number on your list. Clients include Amazon, Siemens, BBB, YMCA, San Antonio Spurs, Avon, and Syracuse University.