Just installed ISPconfig 3 (from the latest github master) on Ubuntu 16.04 with nginx, following this tutorial. Two things I bump into: - Apparently I have installed clamav, amavisd, spamassassin, postfix and dovecot. It is however unclear to me how e-mail routing is done now, for incoming and outgoing mail. For example; I used to have all headers containing "localhost" and "127.0.0.1" removed from mail going out of my servers, using header_checks in postfix but these don't seem to do anything when I send mail using an ISPconfig domain. Any method I've overlooked? Is postfix config being overruled somewhere I haven't seen? - I'm trying to find a reason that really proves the value of SA and amavisd to me, but it still seems enormously resource heavy/high maintenance mail-filtering for the gains. Smart use of RBLs, whitelists and just header_checks and body_checks does wonders, as far as my experience goes. I used to be quite happy with postfix and clamsmtpd doing *all* the filtering I need. I have years of mail-filtering experience in postfix, and it worked well. The only big change I would welcome is having the filtered mail appear in the user's Junk folder, systemwide. Is this hard to accomplish, or do I really need amavisd and SA to get there? Thanks for any and all advice, I love your panel thus far, especially since it's free.