All email, Facebook messages, Tumblr messages, Twitter DMs, Youtube messages, and the like are confidential. As a general rule, I do not share information about my private correspondence without permission. Those that have messaged me can attest to how well I abide by this rule.
PS - There has been one exception. Someone that this blog had contact with was arrested for child porn. I had to explain my involvement with his youtube account. Even then, I merely summarized our interactions.