Email is a flexible and extensible technology. Structured email is the approach to allow for machine-readable content in email messages, which helps users to process emails more efficiently. It's currently also subject of a standardization initiative in the IETF's SML working group.

The demo will show a plugin for Roundcube Webmail which allows users to receive and process structured email and also to compose email messages sent to others. It will also highlight structured vacation notices as one particular use case. Those build upon the Sieve vacation extension and the corresponding Roundcube plugin.

The structured email Roundcube plugin is partly funded by NLnet (https://nlnet.nl/project/StructuredEmail/)