I am trying to integrate Zimbra Postfix with Mailman and I'm stuck.

Here is an excerpt from Mailman installation guide :

First, you need to set up the Postfix virtual alias domains as described in the Postfix documentation (see Postfix's virtual(5) manpage). Note that it's your responsibility to include the virtual-alias.domain anything line as described manpage; Mailman will not include this line in virtual-mailman. You are highly encouraged to make sure your virtual alias domains are working properly before integrating with Mailman.
I know that there is already a virtual_alias_maps table setup (with ldap lookup, in Zimbra Postfix). What I could not understand is the comment about "virtual-alias.doman anything" entry.

Has anybody tried integrating mailman with Zimbra?