| 15 | Yahoo has published information to all mail providers telling them to reject any message that claims to be from Yahoo that does not properly prove it was sent from a Yahoo server. When you send a message to an email list, the email list will resend that message to all subscribers to that list. As a result, the message is not being sent from a Yahoo server, it is being sent from the server running the mailing list. When accepting email, servers are not able to verify that the message was coming from Yahoo, so they reject the message. |