A Direct message is a personal message sent via Twitter to one of your followers. DMs are different than mentions and @replies.
Tip: Make sure that user follows you. You can only send a direct message to your followers.
In addition to sending Direct messages from the web, you can also send Direct messages from:
Note: If your message is longer than 140 characters and Twitter receives it intact, we will send your message in two parts for you. But, be aware: if your service provider breaks up long messages into two parts before sending the message to Twitter, we will only see the d+username attached to the first message! The second part will post to the public time line as a regular update because it doesn't have the d+username preceding it.
If your Twitter account is connected to your mobile phone, you can receive Direct messages via text.
Check out our Tweet & DM Troubleshooting section for solutions to commons problems.