COI is a free & open standard that is built on top of the IMAP and SMTP standards.
The COI ecosystem is made up of the COI Standard plus compatible Client Apps and Email Servers.
COI works with all email servers, but IMAP servers can be enhanced with extra COI capability. These extra capabilities make the development of both services and applications much easier and more powerful.
Developing COI Apps
If you want to develop a COI app, there are several options:
- Extend an existing COI app such as OX COI Messenger.
- Use a COI-compatible client middleware component such as Delta Chat Core.
- Use the COI specifications along with any IMAP and SMTP library.
Developing COI Servers
To make your IMAP server compatible with COI, you need to implement the COI specifications.