from win32com.client.gencache import EnsureDispatch
outlook = EnsureDispatch("Outlook.Application")
olNamespace = outlook.GetNamespace("MAPI")
olFolder = olNamespace.GetDefaultFolder(10)
olConItems = olFolder.Items
for olItem in olConItems:
if "_DistListItem" in str(type(olItem)) and olItem.DLName == 'test1':
print(olItem.DLName)