this is my folder structure

e:\webspace\resadmin\domain\domain.com\lot of stuffs here
e:\webspace\resadmin\domain1\domain1.com\lot of stuffs here
e:\webspace\resadmin\domain2\domain2.com\lot of stuffs here
e:\webspace\resadmin\domain3\domain3.com\lot of stuffs here
e:\webspace\resadmin\domain4\domain4.com\lot of stuffs here


and I need to build a list in a txt file with:

domain.com
domain1.com
domain2.com
domain3.com
domain4.com