What is OBM ?
The OBM Blog
Install and configuration
Architecture and components
Hey, I found a bug! Now what?
Contributing to OBM, getting started
Warning, this information is not up to date and should only be used on older OBM version (prior to 2.4)
These projects can help you getting started with OBM
Thunderbird PST Import
These external contributions are deprecated on OBM 2.4 branch, but could be useful if you are using an Older vesion (like OBM 2.2 for example)