Need a computer software that can send short messages for free ~

Isn't this the platform for mass texting? I recommend you to Ping with Huatang e-guest SMS, the software that you said is distributed to all mobile phone users in groups on the computer. You don't need confirmation to send a text message. He sent them directly to the other party's mobile phone. Huatang e-guest can, but there is a charge. I suggest you learn about Baidu first.