DKIM2 and DMARCbis Have Landed: Stalwart Speaks Them First

DKIM2 and DMARCbis Have Landed

Email authentication has just taken its biggest leap forward with the arrival of DKIM2 and DMARCbis. I explain how these new standards fix decades of flaws like signature breakage on forwarding and message replay attacks. Stalwart is the first mail server to fully support these protocols, creating a verifiable chain of custody that finally secures the path from author to recipient.

"A valid signature means this domain vouches for this content, but until now it said nothing about who the message was for, where it has been, or where it is going next."