Cold Email Deliverability: Land in the Inbox, Not Spam
One bad sending setup can burn your domain reputation for months. Outbound Glow checks your domain health, runs the Inbox Checker before you send, and uses AI to suggest a safe daily sending limit for every mailbox - all before you send a single email.
Why deliverability quietly kills campaigns
Protection Built In, Not Bolted On
Every Layer of Deliverability Protection, Built In
Health checks, warmup, content scoring and real-time monitoring - running before and during every campaign.
Email Account Health Check
SPF, DKIM and DMARC validation before you send, with a score and a clear fix list.
Warmup Inbox
Gradual sending history build-up, starting at 10 emails/day/sender and scaling up.
Domain Reputation Score
Real-time visibility into inbox placement risk as your sending history builds.
AI Suggested Sending Limit
A safe daily send volume per mailbox, recalculated as your domain builds reputation.
Delivery Protection
Auto-pauses campaigns when bounce or unsubscribe crosses a safe threshold - resume without cloning.
Inbox Checker
Confirms you land in Gmail/Outlook primary, and scores your copy for spam-trigger language.
How your domain stays protected, start to finish
Connect & Audit
Connect your inbox, then run the SPF/DKIM/DMARC and domain score check.
Warm Up & Check
Warmup builds natural sending history over 2–4 weeks; Inbox Checker verifies placement and scores your content.
Monitor & Auto-Protect
Delivery Protection tracks bounce and unsubscribe live, pausing and alerting the moment a threshold is crossed.
Protection Built In, Not Bolted On
Most tools let you send first and find out about deliverability problems later. Outbound Glow checks domain health, warms every mailbox, and pauses campaigns in real time, so your reputation is protected by default, not by luck. And the Inbox Checker doesn't stop at infrastructure: its AI reads the email itself, flags spam-trigger language and risky subject lines, and suggests the fix before it ever reaches a prospect.
What stable deliverability is worth
Stable domains remove wasted spend from bounced sends and blacklisted domains.
Consistent warmup and health checks keep you out of spam.
Structured warmup lets you increase volume without risking your sender reputation.
Trusted by 200+ growing businesses
Deliverability FAQ
Email Account Health (SPF, DKIM, DMARC), Warmup Inbox, the Inbox Checker, and Delivery Protection with real-time monitoring all run automatically.
AI suggests a safe daily sending limit per mailbox based on its age, warmup progress and health score, then adjusts it as your domain builds reputation.
The campaign auto-pauses if bounce or unsubscribe crosses a safe threshold - checked every 100 emails sent by default, and you can set your own limit. You get an in-app alert and can resume without cloning the campaign.
It is whether your emails land in the inbox rather than spam. It depends on DNS configuration, sender reputation, bounce rate, sending volume, and the content of the email itself.
Protect your domain before you send your next campaign.
Run a free domain check - no credit card required.