What does it mean when MAILER-DAEMON@yahoo.com  say:?
914676
It means you either typed the e mail addy in wrong or it doesnt exist.
174741
I don't know what yahoo-cop is but I think the reason they reply is because its probably a computer generated email...just a thought anyway
378769
Yahoo is considering your domain as a SPAM. Because your domain not in yahoos database. Once the user move a spam mail to inbox, it will automatically park the next coming mailz to inbox. This is not an error to correct, i guss.\n\ncheers\n\nShaba!
485737
it's a domain name, these odd name are used commonly by spammers to keep their names secret, after they are done sending all their spam, the sever shut-down, leaving withouth a trace...
239898
someone told me it was ccooperatorinc@yahoo.com
346714
Incoming Mail Server (POP3):    pop.mail.yahoo.com\nOutgoing Mail Server (SMTP): smtp.mail.yahoo.com\n\nusing SMTP port 587
565621
assuming you have a mail server running and the box is linux you can type "mail who@where.com" in a terminal and type the message, end the message with a blank line and ctrl-d
118568
there-are-some-advertise-e-mails,sent-for-you\nand-you-dont-wanna-receive-them\nyou-simply-clic-on-the-ceckbox-then-click-spam\nyou-wont-receice-any-e-mail-from-the-sender\nand-yahoo-will-reconize-them-and-will-block-them
269593
I'm not exactaly sure, but from the name, it sounds like a mail server, and I know that my computer gets a "error 403: Forbidden!" on it.
1121643
it means, dear Girl, that if he needs any ammunition against you, depending on the content of your email, he has it. remember never put anything in writing .
401793
basically you've sent your mail to an invalid email address and mailer daemon just notifies you that the message was not sent. :)
30738
It is just notifying you that a message is queued on the mail server either in or out (most likely out) because of some delay on the receiving side. It is most likely just a notification from the Exchange server.
428336
http://www.netlingo.com/emailsh.cfm
1000349
I saw it on a commical. It means like Yahoo.com is so great it will make you saw Yahoooooo. It is suppose to be the best email, search, everything. You know. I will make you happy.
865819
In your situation, (sending mail?) it may be caused by a server being too busy.  Your system sends, and waits for an acknowledgment from the server that it was received.  If the server it too busy (or the mail daemon is down) to respond in a timely fashion, error 10053 occurs.
756251
If it says "mail sent" then that means that it did send the mail to the recipient.  The check mark has to do with whether or not you have added the recipient or want to add the recipient to your address book or not.  \n\nWhen you get a message from the Mail Daemon it is being sent from the recipients mail saying there is an error on that end.  Your Yahoo mail worked properly the problem was with the recipients e-mail.  If you read the message from the Mail Daemon it will give you some idea as to what the problem was.  ie mail box is full or server down etc.
84875
Well you have not given us anywhere near enough info to answer this. What address can they not reply to?\n\nIf a new server then DNS may be the issue. If Yahoo email then the administrator may have blocked access to Yahoo.\n\nNo way to asnwer such a vague question.