Quoting Lorenzo Marcantonio:
> exim[1353]: 2007-04-11 15:00:00 1HbcQU-0000Lm-RX SMTP error from remote mail server after RCPT TO:<xxx@???>: host xxx.xxx.xxx [xxx.xxx.xxx.xxx]: 450 <xxx@???>: Recipient address rejected: Greylisted, see http://isg.ee.ethz.ch/tools/postgrey/help/iw.net.html
> exim[1351]: 2007-04-11 15:00:01 1HbcQU-0000Lm-RX => xxx@??? R=dnslookup T=remote_smtp H=xxx.xxx.xxx [xxx.xxx.xxx.xxx]
> exim[1351]: 2007-04-11 15:00:01 1HbcQU-0000Lm-RX Completed
List policy says: don't obfuscate. And for good reasons.
> As far as I know the message isn't delivered but neither it does bounce back!
> Shouldn't it go in the retry queue after a 450? Why does it is being marked as 'completed'?
As you have obfuscated all relevant information, I can only guess:
Second line is a different host than the first one. Otherwise there
wouldn't be a "=>" and "Completed". So the message _is_ delivered.
You can get the completion message of the remote mta with "log_selector
= +smtp_confirmation", btw.