Red Sift Investigate

Red Sift Investigate is a free browser-based tool that pulls your email authentication records and shows exactly how they're configured. Enter a domain and see your DMARC policy, SPF mechanisms, and DKIM alignment at a glance, with clear explanations of what each setting means. The interface keeps things simple without oversimplifying the underlying DNS mechanics.

It's ideal for anyone auditing email authentication without committing to a paid platform. Marketing teams and small senders use it to verify SPF and DKIM alignment before sending, while security teams run it as a quick diagnosis. The simplicity makes it a natural starting point before considering heavier monitoring tools.