• “Starting Dec 17, adult content will not be allowed on Tumblr.” https://tumblr.zendesk.com/hc/en-us/articles/231885248-Sensitive-content 22 comments 3/12/2018
• Tumblr – Heads-up for AT&T customers https://tumblr.zendesk.com/hc/en-us/articles/115007729788-Heads-up-for-AT-T-customers 15 comments 26/6/2017
• Heads-up for AT&T customers (tumblr blocking e-mail domains) https://tumblr.zendesk.com/hc/en-us/articles/115007729788-Heads-up-for-AT-T-customers 2 comments 25/6/2017