If you receive an SMTP error or bounce message containing the text string

UP Email not accepted for policy reasons. Please visit http://help.yahoo.com/help/us/mail/defer/defer-04.html

there is something about the message contents that Yahoo! Mail will not accept for policy reasons. For instance, it is against Yahoo! Mail's policy to send phishing/fraud attempts or viruses. If you feel you have received this error for a message that should be accepted, and you were the original sender, please use the contact form below to submit the following information to us:

• the full email
• headers
• sending IP address

We will examine the issue and take appropriate action as necessary. Please note that we will be unable to help you without receiving all three pieces of information.