Website info requests to a live body

I'm wanting to set up the ability for a web site user to send an email to
addresses such as "sales@xxxxxxxxxxxxx", "customerservice@xxxxxxxxxxxxx",
"info@xxxxxxxxxxxxx", etc and I need to know if I'm barking up the wrong
tree.
  
I want the emails to go to some user in our company.  That user could change
from day to day or week to week.

The i5 _is_ the mail server.  I found IBM Software Technical Document
22513710 which describes using a Distribution List ("DL").  This piqued my
interest because I didn't know there was such a thing as DLs on the i5, and
thought this would make it really easy to change who handled these emails,
or even have them delivered to multiple users.

I set up a DL called SALES with me as the only member.  If I do a SNDDST to
this DL, I get it as an email, which is good.

I set up a user ID SALES (which cannot sign on), added a directory entry
SALES, and tried to forward it to the DL per the instructions in that Tech
Doc.  Doesn't work.  The email goes to the IFS folder where mail would be
stored for user SALES.

Am I trying to mix some old SNA stuff with TCP/IP and the two shall never
meet?  Or should this work and I've just messed something up?

Thanks.