I figured it out. There are default aliases for support and sales. It's too bad the logs don't show what the alias engine is doing.
> On Oct 10, 2014, at 11:36 AM, Viktor Dukhovni <postfix-us...@dukhovni.org> > wrote: > >> On Fri, Oct 10, 2014 at 09:22:36AM -0400, Cary Lewis wrote: >> >> alias_database = hash:/etc/aliases >> mydomain = roadpost.org >> mydestination = roadpost.org, localhost, $mydomain, mail.roadpost.org, >> www.$mydomain, ftp.$mydomain >> myorigin = roadpost.com >> >> Here are some fragments from the maillog: >> >> Doesn't work - supp...@roadpost.org >> >> Doesn't work - supp...@roadpost.org >> Oct 10 09:19:27 3202184 postfix/qmgr[9316]: C95771EE06CF: recipient limit >> 5000 > > Please turn off verbose qmgr logging by removing "-v" from its > master.cf entry. These log entries are just a distraction and > performance bottle-neck. > >> Oct 10 09:19:27 3202184 postfix/local[22993]: C95771EE06CF: >> to=<supp...@roadpost.org>, relay=local, delay=0.04, >> delays=0.03/0.01/0/0, dsn=2.0.0, status=sent >> (forwarded as CF5501EE03FF) > > This local recipient is subject to forwarding because of an aliases(5) > entry or a .forward file. > >> Oct 9 17:06:28 3202184 postfix/local[6302]: 59CC81EE06D0: >> to=<suppo...@roadpost.org>, relay=local, delay=0.03, >> delays=0.01/0.01/0/0.01, dsn=2.0.0, status=sent >> (delivered to maildir) > > This one is not. > > -- > Viktor.