My yahoo email account has been "suspended"- error message is: From: [email protected] [mailto:[email protected]] Sent: Wednesday, April 28, 2010 9:10 AM To: Ron Fior Subject: Delivery failure Message from yahoo.com. Unable to deliver message to the following address(es). : This account has been temporarily suspended. Please try again later. I have urgent business to conduct this afternoon, can you please help? Thanks, Michele

It implies there is an invalid yahoo account. Setup the account again

They are coming to your account because they are being sent from your account by a hacker. Change your password.

If you didn't send any of those emails, you might have spyware or a virus infecting your computer. Run a virus scan if you have anti-virus software installed, and hopefully it will find and remove the infection. If you don't have anti-virus software, you should definitely download and install a program. Avast and AVG both offer free anti-virus scanners. If you have the Yahoo! Toolbar, you can run CA Yahoo! Anti-Spy directly from the toolbar, which should be able to detect most spyware and some viruses.

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 which 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. Bounced messages normally consist of two parts. The first contains the reason for the bounce; the second contains your original message.
The most common reason for a failed delivery is that the email address you entered is not valid. If the Mailer Daemon says that the account does not exist, double-check the spelling of the address you entered. A single mis-placed letter can be enough to cause a failed delivery. If the message continues to be bounced back to you, you may want to verify that the account has not been closed or moved.
If there is a different reason given and you would like us to investigate it, If you can copy and paste the reason given for the failed delivery into the message you send us, it will be very helpful as we attempt to determine why your message bounced.

the address to wich you are try to send email that address is wrong so you check the receipients address because of this you get failuer notice from yahoo....
check your each contacts ...

there could be some virus, report to the yahoo..

I think there's no other way except contacting your yahoo support. In free email, no important setting you can set.

try sending me an email:
if it doesn't work, post the entire message with full headers here.

fixya[at]liquiddesignonline[dot]com

Why do I get a "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.

Bounced messages normally consist of two parts. The first contains the reason for the bounce; the second contains your original message.

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.

If there's a different reason given and you'd like us to investigate it, just let us know.

If you can copy and paste the reason given for the failed delivery into the message you send us, it will be very helpful as we attempt to determine why your message bounced.

Source

if I'm not mistaken a mailer daemon is a service in an email server
it looks like a default response from the service letting you know the person you were trying to reach with the account you enter for destine account is not valid account.

try to check the spelling of the destine account holder... [email protected] make sure enter the ending aswell [email protected] some accounts may even have a [email protected] to indicate the the region the account was created in if that applied when the account was created..

test by creating an account yourself and sending email to that account..
test by also sending an email to yourself.

if no possitive result try checking with yahoo directly here
http://help.yahoo.com/l/us/yahoo/edit/