Folderly is a deliverability platform we reach for situationally, when placement is the problem rather than the copy. Its job is to diagnose why messages land in spam and fix the underlying causes, instead of warming an inbox and hoping placement quietly improves on its own. It runs inbox placement tests across Gmail, Outlook, Google Workspace, and Microsoft 365, checks DNS and authentication, flags spam-trigger words in templates, and warms mailboxes to build sender reputation over time. The dashboard tracks where mail actually lands as live campaigns run, so problems surface early. Folderly treats deliverability as an ongoing system to maintain, not a one-time switch you flip once and then forget about. We reach for it when a client's outbound is sending fine but replies have dried up. That pattern usually points to a placement issue rather than the message, and its diagnostics beat the warmup-only tools when something is genuinely broken. It sits as a monitoring layer alongside the existing sequencer, so we bolt diagnostics on top without disrupting the sending setup the client already runs. The sequencer keeps doing the outreach while Folderly watches placement in the background. We lean on it to find the technical and content root cause rather than guess at fixes, then act on whatever it surfaces. For a client whose outbound was working until it suddenly was not, that targeted diagnosis is worth far more than another generic warmup tool.