That's what I do.Jellybean -- there are several ways to sign e-mail LOL
1 method ive seen is one hand in "C" and the other hand have the pointer finger going thru the "C"
another method ive seen is 1 hand is open palm up and the other hand is in "E" and sign it as in "send"
another is ofc to just spell it out
hope my definitions helps if this is what u are thinking qq
WE have both hands in a fist shape opposite of each others first then both our pointer finger flick out toward each others repeatly.