I just set up a new ISPConfig 3 Debian Lenny system in Production and I’ve been going over the error logs, tightening things up, etc. I followed the Perfect Server tutorial, the one with Courier and MyDNS. This morning, I noticed over 30 errors like the following that accumulated over the weekend in /var/log/mail.log: Code: Nov 8 10:35:10 ServerID postfix/local: 40D1E12646: to=<admin1@ServerID.hostingprovider.com>, orig_to=<root@ServerID.hostingprovider.com>, relay=local, delay=0.06, delays=0.01/0.02/0/0.02, dsn=5.1.1, status=bounced (unknown user: "admin1") Here’s the thing – I didn’t set up a user named “admin1” on this system. I’m guessing that admin1 is a leftover from a previous installation that my hosting provider did. But that’s just a guess. I searched the hard drive for admin1 and, besides the error logs, I found the following match: Code: Binary file /etc/aliases.db matches /etc/aliases:root: admin1 How can I solve these errors? Is there any way to clean up the aliases.db file given that I don't have the original? Is there any way to know which program is sending out these emails and maybe correct the address there? Or is there some other simpler way?