Email "Failed Delivery" message
When you get mail from a "MAILER-DAEMON" or a "Mail Delivery Subsystem" with a subject similar to "Failed Delivery," this means that a message you sent was undeliverable and has been bounced back to you. These messages are produced automatically and usually include a reason for the delivery failure.
Failed or "bounced" messages normally consist of two parts:
- The reason for the bounce
- Your original message.
Hi. This is the qmail-send program at yahoo.com.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
18.104.22.168 failed after I sent the message.
Remote host said: 554 delivery error: dd This user doesn't have a yahoo.com account (firstname.lastname@example.org) [-5] - mta123.mail.mud.yahoo.com
--- Below this line is a copy of the message.
Received: (qmail 24519 invoked by uid 60001); 11 Nov 2010 15:37:25 -0000
X-Mailer: YahooMail/11.4.9 YahooMailWebService/0.8.107.285259
Date: Thu, 11 Nov 2010 07:37:24 -0800 (PST)
From: Yahoo Customer Care
Subject: Test Message
Content-Type: multipart/alternative; boundary="0-162906830-1289489844=:24510"
Content-Type: text/plain; charset=us-ascii
[Text of the original message here]
The most common reason for a failed delivery is that the email address you entered isn't valid. If the Mailer Daemon says that the account doesn't exist, double-check the spelling of the address you entered. A single misplaced letter can be enough to cause a failed delivery. If the message continues to be bounced back to you, you might want to verify that the account hasn't been closed or moved.