Most people are running email campaigns with damaged domains and they don't know it. Now you can find out quickly and easily. Folderly Lens checks public DNS, authentication, MX, IP rDNS, and blacklist signals, then returns a KILL / REHAB / KEEP verdict with a copyable fix plan. No signup, no mailbox access, no test sends.
Hey Product Hunt :wave: I'm Vlad, Founder of Folderly.
We've spent years helping sales teams fix deliverability problems after they've already killed their sender reputation and the most painful cases are always the same: someone bought 20+ sending domains from a reseller, assumed they were isolated, and found out they weren't when reply rates collapsed.
We thought we'd put together a simple tool that could help.
Folderly Lens exists because that diagnosis used to require either a consultant or painful manual DNS spelunking.
Now you paste your domain/IP list, and in seconds you get a per-asset KILL / REHAB / KEEP verdict backed by live SPF, DMARC, DKIM, MX, rDNS, and blacklist checks.
No mailbox access, no API keys, no test sends.
We built this for outbound agencies and sales teams running multi-domain estates who need an answer they can actually act on. The first full audit is free, and we've already run it on a 90-domain client estate where we found 17 SURBL-listed domains the team had no idea about.
Would love your feedback and if you're running cold outbound, drop your estate in and let us know what the scanner surfaces. :pray:
Genuine question, not trying to be difficult: since there's no test send and no mailbox access, the KEEP verdict is really an inference from DNS, auth, and blacklist signals, not an actual inbox placement result. A domain can pass every SPF/DMARC/rDNS check and still get filtered by Gmail or Outlook on content or sender-behavior signals that only show up in a real seed test. How do you handle that gap, or is Lens meant purely as a triage step before someone runs an actual placement test?
Love that you baked the SPF and DMARC generators right in, a lot of tools make you pay or hunt those down separately. Clean way to handle a real pain point for anyone managing deliverability.
How does the AI actually decide what tweaks to make to my SPF and DMARC records when something is off, and can I review the changes before they go live?
The spam words checker caught a few phrases in my last campaign that I would have totally missed. Nice to have the SPF and DMARC generators right there too instead of digging through docs.
Does the AI actually suggest specific fixes when it flags something, or do you just get the alert and have to dig in yourself?
How does Folderly actually fix existing deliverability issues, or does it mainly flag them so you have to handle the changes yourself?
The free spam words checker caught a phrase in my newsletter draft I never would have spotted, super handy little tool.
How does Folderly handle warm-up for completely new domains with no sending history? Also curious if it integrates with SendGrid and Mailgun out of the box or needs custom setup.
How does Folderly actually fix things if my domain is already on a blacklist, or does it only help catch issues before they get that bad?
Finally tested the spam words checker on a campaign that kept landing in junk, and it caught a few phrases I would have missed. Setup was quick and the DMARC generator saved me some googling.
The spam word checker caught a few phrases I would have totally missed in my welcome email. Setup took a couple of minutes and the inbox placement test was genuinely useful for spotting issues before sending.
The DMARC record generator saved me a bunch of setup time, and the deliverability score gave me an honest look at what was actually breaking in my last campaign. Solid tool.
How does the AI actually decide when an email is at risk of being flagged before you hit send, and does it work with custom domains hosted outside the usual providers like Google Workspace or Microsoft 365?
Love that the free spam words checker and SPF/DMARC generators are right there without forcing a sign-up, makes it way easier to trust the paid monitoring side. Clean execution.
Does Folderly actually catch issues before sending, or does it only flag problems after your emails have already hit spam filters?
How does Folderly actually fix an issue once it flags a spam trigger or blacklist hit, does it offer hands-on help or just tell me what's wrong and leave the cleanup to me?
Ran a quick test on my SPF records and it flagged a missing include that I completely missed for months. Clean layout, fast results, genuinely useful for anyone juggling email deliverability headaches.
Finally tried Folderly for my newsletter and the spam words checker flagged a couple of phrases I would have missed. Nice to have SPF and DMARC generators right there too instead of digging through docs.
Love how clean the spam words checker is, the instant feedback without any clutter is exactly what I needed when auditing campaigns.
About Folderly Lens on Product Hunt
“Domain health analysis for high performance email campaigns”
Folderly Lens launched on Product Hunt on July 1st, 2026 and earned 114 upvotes and 29 comments, placing #20 on the daily leaderboard. Most people are running email campaigns with damaged domains and they don't know it. Now you can find out quickly and easily. Folderly Lens checks public DNS, authentication, MX, IP rDNS, and blacklist signals, then returns a KILL / REHAB / KEEP verdict with a copyable fix plan. No signup, no mailbox access, no test sends.
Folderly Lens was featured in Email (36.7k followers), Marketing (465.8k followers) and SaaS (43k followers) on Product Hunt. Together, these topics include over 132.2k products, making this a competitive space to launch in.
Who hunted Folderly Lens ?
Folderly Lens was hunted by Vladyslav Podoliako. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Folderly Lens stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Vladyslav Podoliako