Hi All, I recently re-installed my two ISPConfig servers (I wanted to make some changes and decided it'd probably be better to start from fresh). I've just been doing some testing, and I found that I can send outbound mail without authentication with postifx. Is this normal for a fresh install, or have I missed something in the documentation? To clarify: It's not acting as an open relay; but if I telnet in and manually create a message with MAIL FROM: a valid mailbox address and RCPT TO: an email address hosted somewhere else, the message is queued and processed. I wonder if this is expected behaviour for a new install, or whether I missed something; surely with a quick glance at the header of a mail received from me, anyone could simply send bogus email as me? I'd be really grateful for help setting-up a requirement for authentication with mailbox credentials as configured in ISPConfig. Many thanks, Rob.