How do I enable piping in /etc/aliases?

The default configuration in Debian is that piping is disabled. I think that Mailman will start to work if I enable it.

Which mailserver? In postfix, it's enabled by default. Also, if you're not already committed to a particular MTA, postfix has nice automatic support for mailman (or, vice-versa, mailman make support in postfix nice.)

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The irony is that Bill Gates claims to be making a stable operating system and Linus Torvalds claims to be trying to take over the world.
-- seen on the net

I have Exim4 installed. Do you know how to make it work with Exim4 by enabling piping? I didn't think the piping thingy was tied to Exim4 and that it could be solved by replacing it. I'll see if that can be an option. Thanks for the tip.

Take a look at this. In particular the comment where it says "In fact in Debian Sarge's standard exim configuration pipes in /etc/aliases are not honored anyway."

The main article plus the rest of that comment may solve your problem.

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/ Peter

Thanks for the tip. I'll look into it and report back.

I went with the "install postfix instead of exim4" option and it worked out of the box. Thanks everyone for your help.