How do you send a private message on Tumblr?

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Tags

1. #answer
2. #anything
3. #those
4. #private
5. #dashboard
6. #button
7. #answered
8. #inbox
9. #envelope
10. #click
11. #compose
12. #marked
13. #initiate
14. #message
15. #published
16. #responses
17. #publicly
18. #entry