on a basic default apache installation, mod_rewrite doesn’t work by default.
i’ve determined that in all the cases i’ve experienced, it’s because AllowOverride All is not specified (by default, it’s AllowOverride None).
here are other troubleshooting steps to consider (credit to jdMorgan from webmasterworld.com):
enabling mod_rewrite on apache.
qmail error resolution: sorry, although i’m listed as a best-preference mx for that host, it isn’t in my control/locals file.
today, i had to reenable a domain through plesk. once the guy’s site was up and running, he said that he couldn’t receive email. i sent him a test email and had the following message:
Sorry. Although I’m listed as a best-preference MX or A for that host, it isn’t in my control/locals file, so I don’t treat it as local. (#5.4.6)
how come? i honestly never saw this problem before.
well, qmail/plesk stores the hostname in a file located in /var/qmail/control/rcpthosts. i checked and it was there. so what gives?
my guess is that plesk did things too quickly, or not well enough. i ended up having to restart qmail. after that was done, he began receiving his messages again.