William Robinson writes "If your e-mail does not have a Sender ID, Microsoft wants to junk your message. Somewhere after November, MSN and Hotmail will consider it as spam. Sender ID is a specification for verifying the authenticity of e-mail by ensuring the validity of the server from which the e-mail came. Some experts feel that 'Sender ID' is not an accepted standard and has many shortcomings. Some also feel that Microsoft is trying to strong-arm the industry into the adoption of an incomplete and not accepted standard."