The footer that is added to each message in this list is not DKIM (and thus DMARC) compatible. DKIM requires the ability to create a signature on a set of headers and the body. By changing the body, the DKIM signature fails and the resulting messages sent by the mail list may in the future be blocked by more and more mail servers. Gerben Wierda Chess and the Art of Enterprise Architecture Mastering ArchiMate Architecture for Real Enterprises at InfoWorld On Slippery Ice at EAPJ