WarmySender: Stop Watching Your Cold Emails Land in Spam Before Anyone Reads Them
A perfect cold email gets zero replies if your domain is already flagged as spam. Most outreach tools let you build the sequence and leave deliverability entirely up to you — which is exactly where most campaigns quietly die.
WarmySender covers cold email, inbox warmup, address verification, and sequencing from one platform, so your messages actually reach the inbox before they need to be good.
What does it actually do?
Build your audience straight from a 200M-contact B2B database, a CSV, or a Sales Navigator URL, and enroll prospects automatically across every step of a sequence. Test up to 26 subject line variants with A-Z testing to find the angle that actually gets replies, and catch deliverability problems before you send with the built-in spam score checker.
Protection that runs without you watching it
Every mailbox gets warmed up automatically through A.H.D.E. (Authentic Human Deep Engagement), and every address gets checked by Bounce Shield before it ever enters a sequence — catch-all domains included. Mailbox rotation and smart send pacing protect your sender reputation in the background, campaign after campaign.
Hand the busywork to an AI agent
Connect your mailboxes and link an AI agent over secure OAuth, then describe your offer in plain English and watch it build, verify, and launch the sequence for you. Every reply lands in a single unified inbox, so a hot lead never gets lost in five different tabs.
Who is this for?
Built for consultants, marketing agencies, and sales managers running cold outreach who need replies to land, not just emails to go out.
The deal
Every day your domain sits unwarmed is another batch of cold emails landing in spam before anyone reads them. With lifetime access, deliverability protection and a 200M-contact database run in the background for good, not for another month you have to keep paying for. Pick the tier that matches how much outreach you actually run, from a solo sender up to an agency managing multiple client workspaces.
Fix the part of outreach that’s actually been costing you replies.
