Mailflo audits your sender reputation, fixes authentication, warms your inboxes, and monitors deliverability 24/7 — so your cold emails land in primary, not spam.
Trusted by growth teams worldwide
Why cold email campaigns fail
Your copy could be perfect. Your list could be pristine. But if emails never reach the inbox, none of it matters.
Spam folder placement kills open rates and destroys pipeline. Most teams discover the problem weeks in — after their domain reputation is already damaged.
Low open rates are rarely a copy problem. They're a deliverability problem — one that no amount of A/B testing will fix if your emails never reach the inbox.
A single blacklist flag can halt an entire campaign. Without continuous monitoring, most teams don't know they're listed until the damage is irreversible.
Authentication failures are the most common — and most avoidable — cause of inbox rejection. Getting DNS records right requires precision that most teams lack.
Done-for-you deliverability
Six services that cover the complete deliverability stack — from first-send audit to ongoing inbox monitoring.
A full diagnostic of your sending infrastructure: authentication records, blacklist status, IP reputation, and historical placement data — all in one report.
We configure and publish the complete authentication stack for every domain you send from, then monitor for drift and auto-repair any misconfiguration.
AI-driven peer-to-peer warmup builds genuine sender reputation with inbox providers over 14–21 days before you send a single cold email.
We monitor 50+ blacklist providers in real time and submit removal requests the moment a flag appears — cutting downtime from days to hours.
Weekly inbox placement reports, DNS health checks, and instant alerts for any change that could affect deliverability — so you never fly blind.
Sending volume is distributed across your mailboxes automatically based on real-time health scores, protecting daily limits and keeping placement rates high at scale.
Our process
A four-step process that takes you from deliverability problems to consistent primary inbox placement.
We run a complete reputation audit: DNS records, blacklist status, sender score, and historical placement data for every domain in your setup.
Authentication records are published and validated. Mailboxes are provisioned on real Google Workspace or Microsoft 365 accounts with full profiles.
Every mailbox enters our AI warmup network. Reputation builds naturally over 14–21 days while you prepare your outreach sequences.
Continuous monitoring across placement, DNS health, and blacklists. We catch issues the moment they appear — before your campaigns feel them.
"Our open rates were stuck at 8% for months. Within three weeks of Mailflo fixing our deliverability setup, we hit 71% — and our reply rate tripled. The ROI was immediate."
Related service
Need mailbox provisioning alongside deliverability services? See how Mailflo handles the full infrastructure stack.
Everything you need to know about Mailflo's done-for-you email deliverability services.
We'll review your current sending setup, diagnose every deliverability gap, and show you exactly how Mailflo fixes it — live, no slides, no pitch.
Join 1,000+ teams that trust Mailflo to keep their cold emails in the primary inbox — every send, every day.
Fix My Deliverability NowFree audit. No credit card required.