The email deliverability platform for high volume teams
Folderly diagnoses why your emails fail and fixes the root causes so your outbound performance compounds as you scale.
How our email deliverability platform accelerated performance for customers across our case studies
The industry has been solving the wrong problem
For years, outbound teams have been sold warm-up as the fix. Warm-up is one signal among many. It improves early delivery rates, then crumbles as you scale and as campaigns mature toward the point where they actually generate revenue.
Meanwhile the bar moved. Gmail and Microsoft raised sender requirements twice in two years. AI-generated outbound is flooding inboxes and training new filtering systems. Sender reputation is more fragile than it has ever been, and it degrades quietly: no bounce, no error, just a slow decline in replies that looks like a copy problem, or a list problem, or a market problem.
Set up your DNS once, run a warm-up cycle, trust your sequencer. That approach stopped working. Deliverability is not a task you complete. It is infrastructure, and infrastructure needs managing.
How Folderly manages deliverability
Diagnose
We audit every layer that decides whether your email is delivered: authentication and DNS, domain and IP reputation, content and sending patterns, list quality, and how each mailbox provider is currently treating your domains. You get the specific reasons your email is failing, ranked by impact, not a health score with no explanation attached.
Fix
Your specialist works the root causes in priority order. Authentication records corrected. Damaged reputation rebuilt. Sending patterns restructured around what providers actually reward. The list problems that keep re-triggering filters removed. This is hands-on remediation by someone accountable for the result, not a checklist handed back to your team.
Monitor
Seed-based placement testing runs continuously across every major provider, so a change in how Gmail or Outlook treats your domain shows up the day it happens. Alerts reach you in Slack or email while it is still a small problem, instead of surfacing three weeks later as an unexplained drop in replies.
Compound
Because reputation strengthens with consistent, well-managed sending, teams on Folderly see performance improve as they scale. That is the opposite of what happens to teams treating deliverability as a setup task they finished last quarter.
What the platform covers
Authentication and DNS
SPF, DKIM, DMARC and BIMI configured correctly, then kept correct as domains, sending tools and infrastructure change underneath them. Misconfiguration here is the most common cause of sudden, total delivery failure.
Reputation monitoring and repair
Domain and IP reputation tracked across every major provider, with active remediation the moment a signal degrades. Reputation is the slowest thing to rebuild, which is why we do not wait for it to break.
Inbox placement testing
Seed-based testing shows where your email actually lands across Gmail, Outlook, Yahoo and the rest. Acceptance by a receiving server tells you nothing about whether a human will ever see the message.
Email validation
Validation that checks ESP-specific filters and email protection tools, not just whether an address is syntactically valid. Knowing who you can actually reach protects your reputation and stops you paying to email people who do not exist.
Blacklist detection and delisting
Continuous monitoring across the blacklists that affect B2B sending, with delisting handled for you. Most teams find out they have been listed from a prospect, not from a tool.
A named deliverability specialist
One person accountable for your outcome, not a support queue and not a dashboard you are left to interpret alone. This is the most common reason our enterprise customers stay.
Who this is for
Sales, GTM and revenue leaders
You own a pipeline number, outbound is a material part of hitting it, and right now you cannot confidently say what your sending infrastructure is costing you.
B2B SaaS & tech forward firms
Scaling tech companies, running active cold outreach or large scale email marketing, with a plan to increase sending volume this year rather than hold it flat.
Reply rates fell and nobody can say why
Or nothing is broken yet, you are about to scale, and you would rather find out now whether the foundation holds than after the quarter it costs you.
Folderly case studies
Discover Folderly customers’ success and see how best-practice infrastructure can unlock new levels of email marketing performance.
Learn more
(Up to 50 employees)
(Over 250 employees)
(50 to 250 employees)
(50 to 250 employees)
(Up to 50 employees)
(Over 250 employees)
How this compares to setting it up once
Most tools help you get set up. What matters is what happens in the months after.
| What changes | The usual approach | With Folderly |
|---|---|---|
| Getting set up | You configure it once and hope it holds | We set it up, then keep it right as your stack changes |
| Knowing it works | You can see your emails were sent | You can see where they landed, inbox by inbox |
| Sending more | Results slip as your volume climbs | Results improve as your reputation builds |
| When something breaks | You find out when replies dry up | You hear from us the day it starts slipping |
| Getting it fixed | Your team works it out from a dashboard | Your specialist fixes it and owns the result |
Supported ESPs
Folderly integrates via API and SMTP with major email service providers and supports custom providers too
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Folderly works with any sending architecture
Don't see your ESP on the list? Request a demo and we'll show you how Folderly can work with the tools you already use.
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