I've just had to migrate from my existing server to a backup box due to hardware failure. After doing so, I am unable to get the config quite right with Google Apps and Postfix, here are my symptoms:
I host many websites, around 50 or so at present, most of which use Google Apps, or some other off-site service - all of these work fine.
I have a single client who uses the local mail system on this server, but for some reason the mail intended for them gets redirects off to a Google Apps account.
The server's mailname as configured in
/etc/mailname is mydomain.co.uk (obfuscated), and the client's domain who requires local delivery is theirdomain.co.uk. mydomain.co.uk has mail for its domain handled by Google Apps.
What happens is that mail intended for email@example.com (or user.theirdomain) is redirected to firstname.lastname@example.org and therefore delivered via Google Apps rather than to the local user.theirdomain.co.uk mailbox.
After a few hours of searching, I can't seem to find the issue. I'd really appreciate a little help from you guys.