when i was working with mail address , one stage i had to export the contact list to a file and found there is junk mail address which obviously long lines like 013f8be66f33ce4b6dc28e505e56ddda@m.facebook.com
so i found a way to remove all lines longer than 40 characters with the most powerful VI editor
open your file in vi
# vim filename
and type this
:g/.\{40,\}/d
whala! you will see a message – something like this
324 fewer lines
