Is it possible to upload an image to Tumblr over Flickr by email feature? It looks like Flickr is offering that but it's not working for me: (Login required) http://www.flickr.com/blogs.gne
It seems Flickr does not have email support for Tumblr, yet as described by a staff member 7 months ago:
Although, we currently do not support posting to Tumblr blogs via upload by e-mail, you can submit your idea for improvement or feature request to Flickr ideas:
I have browsed the topic and have not seen the idea listed so maybe consider submitting the idea.