[Mailman-Users] Can I use /usr/sbin/postmap myself to updatevirtual-mailman.db?

Mark Sapiro mark at msapiro.net
Tue Aug 2 01:03:37 CEST 2011

Ulf Dunkel wrote:
>Now I see that the virtual-mailman file isn't updated for these simply 
>copied mailing lists, but only for newly created ones. The file warns me 
>to edit it myself, but rather have it auto-updated from the 
>virtual-mailman.db file.

Actually, that's not what the warning means. See below.

>If I have understood the process correctly, every time when I create a 
>new mailing list, Mailman will add the relevant data to the 
>virtual-mailman.db and run /usr/sbin/postmap to have the virtual-mailman 
>file updated for Postfix.

That's backwards. Mailman adds the relevant data to the virtual-mailman
file and then runs /usr/sbin/postmap to update the virtual-mailman.db
file from virtual-mailman. When you put something like
hash:/path/to/data/virtual-mailman in your Postfix config, that tells
Postfix to consult the corresponding /path/to/data/virtual-mailman.db
database and to generate warnings in its log if the
/path/to/data/virtual-mailman.db is not at least as new as

>Can I do this myself on the Server console? I would really like to avoid 
>having to create all these mailing lists again ...

What you want to run is Mailman's bin/genaliases which will completely
rebuild data/aliases and data/virtual-mailman based on the lists in
the installation including those you added by copying and run the
relevant postalias and postmap commands to update the .db files.

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

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