Need better instructions for requesting bridges via email

For bridges obtained via email by emailing bridges@ it's not clear how/where to request bridges via email.

E.g the bridges.tpo website simply says to email bridges@ to get bridges

Emailing that address gives you a number of commands but doesn't specify where to send the commands (email subject, body...) I tried both and wasn't able to get it to work.

It also specifies that you can combine commands but it doesn't give any examples or indication of how to do so.

This was raised by a user and I also couldn't figure it out after trying for about 5 minutes :/