I keep getting a message that says, "Failed to send message..." when I am using Contact 7 form plugin, which I love. I am sending to a Yahoo server, which requires that you use your domain name, i.e. firstname.lastname@example.org, which I am doing after hours of research! It still doesn't work. Could it be something with using the newer version of Contact 7 because it works fine on another site but that site doesn't have 2.3 version.
Any help would be greatly appreciated. This is baffling to me. I appear to be doing everything right and have called Yahoo 4 times now.