Why can't I send a short message when I change my qq password?

In case of transmission failure, it is usually caused by the following situations:

1, sensitive words: if there is any content involving pornography, gambling, violence, reaction, political and verbal personal attacks or special characters and symbols. It is suggested to use other words instead.

2. System delay: Due to the different network quality at different times and in different regions, it will directly affect the sending of short messages. If you find such a situation, please try again later.

3. Non-friends: the receiver is a friend of the sender, and the sender is not a friend of the receiver. It is suggested to add the other party as a friend before sending it.

4. Font/picture restrictions: For example, SMS is sent in the form of colored characters, QQ colors and custom pictures. Please use the default font to send.

Tips: Please try not to send SMS with the same content repeatedly in a short time, otherwise it may also lead to "sending failure".