RoundCube:
After selecting the message that you would like to see headers for:
- Click Details
- Click All Headers
- Alternatively, you can also select More and Show source
- You can now see the full email headers!
Horde:
After selecting the message that you would like to see headers for:
- Click Other Options (If you did not double click the message)
- Click View Source
- You can now see the full email headers!
