Facebook hosted a DMARC interoperability event earlier this week. In terms of protocol development, interoperability events are a sign that the protocol is ready for more widespread use.
DMARC is a layer built on email authentication (SPF and DKIM) that provides brands with the ability to control use of their domains in email.
Al Iverson has a post up about his experiences with customers who try to acquire email addresses through appending.
J.D. Falk has a post up about the history of DKIM.
Cloudmark has an interesting blog post pointing out some of the challenges of signing mail with DKIM in a large company with a diverse mail system.
Read MoreHotmail has released a new version of their software with some changes. Return Path discusses the changes in depth, but there are a couple that senders may find helpful.
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