A message appeared on the Tor Mail main page in early August 2013, saying "Down for Maintenance Sorry, This server is currently offline for maintenance. Please try again in a few hours." As of August 2013, the service is unavailable. The disappearance of Tor Mail has been linked to the arrest on child pornography charges of the alleged operator of Freedom Hosting, which hosted a large number of .onion.market sites.  In September 2013, the FBI admitted in a court filing in Dublin that it had taken down Freedom Hosting. 
Tor Mail's goal was to provide completely anonymous and private communications to anyone who needed it.  The service providers said that they were anonymous and could not be forced to reveal anything about a Tor Mail user. They also said that the service did not cooperate with anyone attempting to identify or censor a Tor Mail user.
Tor Mail's service consisted of several servers, the hidden service, and an incoming and outgoing internet facing mail servers. The site's operators said that the only data stored on the hard drive of those servers was the Exim mail server and the Tor software. "No emails, logs or personal data were stored on those servers, thus it doesn't matter if they are seized or shut down." They claimed to be prepared to quickly replace any relay that was taken offline. The service and SMTP/IMAP/POP3 were on a hidden server completely separate from the relays. The relays did not know the IP address of the hidden service.