I see the following history in my log during message delivery:
Mar 1 13:35:09 mailserver postfix/pickup[21464]: 5FAFC2A002: uid=0 from=<root> Mar 1 13:35:09 mailserver postfix/cleanup[21526]: 5FAFC2A002: message-id=<20090301213509.5fafc2a...@mailserver.amfeslan.local> Mar 1 13:35:09 mailserver postfix/qmgr[21429]: 5FAFC2A002: from=<r...@mailserver.amfeslan.local>, size=367, nrcpt=1 (queue active) Mar 1 13:35:09 mailserver dovecot: auth(default): master in: user^i1^idmil...@amfes.com^iservice=deliver Mar 1 13:35:09 mailserver dovecot: auth(default): master out: user^i1^idmil...@amfes.com^iuid=5000^igid=8^ihome=/var/mail/amfes.com/dmiller^Imail=dbox:/var/mail/amfes.com/dmiller/Maildir Mar 1 13:35:10 mailserver deliver(dmil...@amfes.com): fdatasync_path(/var/mail/amfes.com/dmiller/Maildir/INBOX/dbox-Mails) failed: Invalid argument Mar 1 13:35:10 mailserver deliver(dmil...@amfes.com): msgid=<20090301213509.5fafc2a...@mailserver.amfeslan.local>: saved mail to INBOX Mar 1 13:35:10 mailserver postfix/pipe[21528]: 5FAFC2A002: to=<dmil...@amfes.com>, relay=dovecot, delay=1.1, delays=0.07/0.01/0/1, dsn=2.0.0, status=sent (delivered via dovecot service)
Mar 1 13:35:10 mailserver postfix/qmgr[21429]: 5FAFC2A002: removed -- Daniel