Hans Gubitz wrote:

I started with mailman and exim4 on Debian testing.

Mail to a list arrives the server, but it is not answered.

In exim4/mainlog I read: 2008-04-28 10:00:06 1JqOHO-0003gP-UE =3D=3D |/var/lib/mailman/mail/mailman post administration <administration@hgk1.gym-nippes.dnsalias.org> R=3Dsystem_aliases defer (-30): pipe_transport unset in system_aliases router

Do you have any hints to fix exim4?

This is an Exim question, not a Mailman question, but since you are here, if you have a more or less standard Exim configuration, you are missing

pipe_transport = address_pipe

from the definition of the system_aliases router.

However, with Exim, you don't need to use aliases for Mailman. See <http://www.exim.org/howto/mailman21.html> for instructions on setting this up.

-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan