I am using webmin/virtualmin since many many years and am totally happy with it. I set up endless numbers of servers with it and never had any problems I couldn't solve.
But now, apparently I ran into one:
On a webmin/virtualmin instance that runs since like 2 years without any problems, we suddenly experience issues w. email. I guess some update messed things up, but I am not sure about that or even which packet might be the cause. The current configuration of the box is a debian 7 wheezy with the latest stable updates, postfix mail_version = 2.7.1, webmin 1.7, Virtualmin 4.09gpl.
As described in the title, since like 2 weeks postfix resp. procmail is delivering ALL email to ALL virtual-servers to ONE single mailbox resp. Maildir, namely to the default account that we used when we originally set up the server email@example.com.
Virtualmin "Re-check and refresh configuration" didn't show any problems.
We compared postfix main.cf and master.cf to one of our other virtualmin-boxes, one which works fine: they are basically the same and /etc/procmailrc and /etc/webmin/postfix/config on both boxes are 100% identical, so the bug doesn't seem to live there (that's why we didn't post them here). We stopped spamassassin, to see if this somehow caused the problem: no, same thing. greylisting is not installed. The server that is working and that we used for comparison is Virtualmin 4.08gpl though.
Reading http://www.virtualmin.com/node/34015 we tired removing the refs to the hostname at the beginning of /etc/postfix/virtual rendering all incoming mail to become undeliverable. Could our problem still be related to this post?
Your feedback is appreciated!