I see you guys support DomainKeys, but what about the more recent DKIM standard?
DomainKeys and DKIM are actually 2 different authentication standards. DomainKeys was developed by Yahoo! and DKIM, a more recent standard, was a collaborative effort between Yahoo and Cisco. While we only support DomainKeys right now, we do plan on adding support for DKIM in the near future. This will not require any additional work or DNS changes on your part, and will be something we handle behind the scenes for you automatically. We’ll make an announcement in the blog the moment we start supporting it.