[rt-users] Error with RT 3.0.12 and email creation of tickets

[IT Security]

I am running Debian with Exim4, Postgres and Apache2.  Everything works fine
but when I send an email to the RT system it won't process and create a
ticket.  I can see in the Exim4 log that it's trying to run the pipe
command:

|/usr/bin/rt-mailgate --queue 'Incident Reports' --action correspond --url
http://localhost

But receive this error:

pipe to |/usr/bin/rt-mailgate --queue 'Incident Reports' --action correspond
--url http://localhost
    generated by rtir at xx.txstate.edu
    Delay reason: pipe_transport unset in system_aliases router


I have done extensive searching on this list and elsewhere and can't find a
solution. 

Thanks in advance for any help!

Elliott Franklin, CISSP
Information Security Officer
Texas State University - San Marcos
512.245.2501