Here is a small excerpt from the bill that outlines shipping eliquid to Indiana:
Sec. 3. (a) Except as otherwise permitted by this article, a person
may not purchase, receive, manufacture, import, or transport, or
cause to be imported or transported from another state, territory,
or country into Indiana, or transport, ship, barter, give away,
exchange, furnish, or otherwise handle or dispose of e-liquid, or to
possess e-liquid for purpose of sale.
(b) A person may not knowingly receive or acquire e-liquid
from a person or authorized distributor who does not hold a valid
permit under this article to sell, deliver, furnish, or give the
e-liquid.
So while it doesn't specifically say you can't sell to someone in Indiana, it very plainly states you can't ship it to us.
It's stupid, but true.