Subject: Returned mail: see transcript for details
From: Mail Delivery Subsystem <[email-masked]>
To: <"niren.dsouza"@lsmindia.com>
Date: Tue, 15 Nov 2022 23:06:38 +0100

The original message was received at Tue, 15 Nov 2022 23:06:32 +0100
from localhost [127.0.0.1]

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: 550 5.1.1 <[email-masked]>: Recipient address rejected: User unknown in virtual mailbox table)

   ----- Transcript of session follows -----
... while talking to in.mx1.evonet.be.:
>>> DATA
<<< 550 5.1.1 <[email-masked]>: Recipient address rejected: User unknown in virtual mailbox table
550 5.1.1 <[email-masked]>... User unknown
<<< 554 5.5.1 Error: no valid recipients