ISPConfig 3 / CentOS 7 / Mailman Bug location of virtual-mailman

Regarding installation or update of ISPConfig on Fedora/RHEL based distributions...
If you are seeing errors like the following in your postfix logs:

Code:

warning: database /etc/mailman/virtual-mailman.db is older than source file /etc/mailman/virtual-mailman

fedora_postfix.conf.master correctly uses the file /etc/mailman/virtual-mailman from the distribution.
However, mailman_plugin.inc.php tries to look for the file /var/lib/mailman/data/virtual-mailman when performing postmap to update the file.
One possible work around is to create a link to the correct file so that mailman_plugin.inc.php can find it and then edit the /etc/postfix/main.cf file to use the same location (/var/lib/mailman/data/virtual-mailman)

Create a Link

Code:

# ln -s /etc/mailman/virtual-mailman /var/lib/mailman/data/virtual-mailman

Edit /etc/postfix/main.cf

Code:

# vi /etc/postfix/main.cf

change: hash:/etc/mailman/virtual-mailman to hash:/var/lib/mailman/data/virtual-mailman

WARNING You will have to edit main.cf each time the ISPConfig interface is updated with this method.