Hi all 
For those interested in inspiration about automated self-destruct message. This is an interesting demonstration by Johan Haals at https://yopass.se This user interface is very easy to use.
Maybe some of yopass code could be recycled for Jami? The full open source code and documentation is at https://github.com/jhaals/yopass
Here are the options of yopass. After which an encrypted message is automatically deleted:
- One Hour
- One Day
- One Week
- Viewed once by the recipient