Short of using 3rd party tools, is there a way of backing up a Posterous blog? If not, how do you suggest I do it (using 3rd party tools)?
By using their reading API 2.0 :
- Login to your posterous account
- Visit http://posterous.com/api/2/users/me/sites/primary/posts
You will receive a json file containing all your posts content.
If you have a Mac, you can use this simple tool: http://itunes.apple.com/cz/app/posterous-backup/id415889466?mt=12
You could also try http://justmigrate.com which basically uses api to move / backup your posterous to Tumblr.
This is also a work around for wordpress 15mb limit for importing posterous backup.