Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Fri, 22 Aug 2008 04:06:12 +0200

The original message was received at Fri, 22 Aug 2008 04:06:11 +0200
from [116.30.96.166]

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: 550 5.2.1 <[email-masked]>... Mailbox Inactive)

   ----- Transcript of session follows -----
... while talking to lmtp.mail.priv:
>>> DATA
<<< 550 5.2.1 <[email-masked]>... Mailbox Inactive
550 5.1.1 <[email-masked]>... User unknown
<<< 503 5.5.0 No recipients, try RCPT first