Jul  8 14:35:06 servername postfix/cleanup[28120]: B6B8314D0B: message-id=<20150708143506.B6B8314D0B@servername.servername.com>
Jul  8 14:35:06 servername postfix/bounce[27912]: B522214D0A: sender non-delivery notification: B6B8314D0B
Jul  8 14:35:06 servername postfix/qmgr[3133]: B6B8314D0B: from=<>, size=9470, nrcpt=1 (queue active)
Jul  8 14:35:06 servername postfix/qmgr[3133]: B522214D0A: removed
Jul  8 14:35:06 servername dovecot: lmtp(28259): Connect from local
Jul  8 14:35:06 servername postfix/lmtp[27413]: B6B8314D0B: to=<myusername@servername.servername.com>, relay=servername.servername.com[private/dovecot-lmtp], delay=0.01, delays=0/0/0/0, dsn=5.1.1, status=bounced (host servername.servername.com[private/dovecot-lmtp] said: 550 5.1.1 <myusername@servername.servername.com> User doesn't exist: myusername@servername.servername.com (in reply to RCPT TO command))
Jul  8 14:35:06 servername dovecot: lmtp(28259): Disconnect from local: Successful quit
Jul  8 14:35:06 servername postfix/qmgr[3133]: B6B8314D0B: removed