It is possible to host your maps. Just send it via email.
Send it to: firstname.lastname@example.org
There are some things required to fullfill that it will be accepted. Please check on the following points to make sure you have all.
- Count of players is in good relation to map size
- AI must work on your map
- One or two lines of description
- Let it be looking good in design, due to stuff, textures and shape.