A help link has been added to the Forwards page.
I also suggest set up a new ID filter function in <e4ward setting> .
e.g. if the ID filter is ***a ( *mean any letter or number, a is for
letter a only , total length is 4 letter/digit) then, only email ID
port like 123a, qwea, 6tya, .... can accept those email.
Other ID combination ( like 5 or 6 letters/digits, the forth letter
is not a ) bounce back.
Any other comments.