Subject: This message not delivered: Looking forward to your response to my proposal
From: "Postmaster" <[email-masked]>
To: <[email-masked]>
Date: Sat, 16 Mar 2024 17:50:13 +0330

This message was created automatically by mail delivery software.  Sorry, 
the message you're trying to send cannot be delivered to one or more 
recipients. The address may be invalid or mistyped. Please view the error 
below:  <[email-masked]>: 550 [email-masked] recipient 
rejected. Recipient does not