: rule - question on behavior and use

[liquiz]

I was working through a bash script to do email rule generation here is a sample of what it spits out

Code:

$@$0$1$2$.$n$e$t$.$i$l
:$@$0$1$2$.$n$e$t$.$i$l
d$@$0$1$2$.$n$e$t$.$i$l
l$@$0$1$2$.$n$e$t$.$i$l
u$@$0$1$2$.$n$e$t$.$i$l
c$@$0$1$2$.$n$e$t$.$i$l
C$@$0$1$2$.$n$e$t$.$i$l
t$@$0$1$2$.$n$e$t$.$i$l

Are the first 2 lines of that equivalent? If so is there a reason to prefer one over the other?

In a rule its not a big deal but overall I have something like 700 plus domains which just adds up.

Peace