@echo off
setlocal enableextensions disabledelayedexpansion
set "nLines=1000"
set "line=0"
for /f "usebackq delims=" %%a in ("addresses.txt") do (
set /a "file=line/%nLines%", "line+=1"
setlocal enabledelayedexpansion
for %%b in (!file!) do (
endlocal
>>"passwords_%%b.txt" echo(%%a
)
)
endlocal