How to check if your email will go to spam before launch
A launch checklist for testing real messages, sender authentication, DNS, headers, content, links, and recipient quality before a campaign or product email goes live.
The launch-day test that actually matters
The most useful spam-folder test is not a screenshot from a design tool or a forwarded proof. It is the final email sent from the same app, ESP, domain, tracking setup, and template that subscribers or users will receive.
Pre-launch flow
- 01
Send the final message to a test inbox
Use the production-like sending path and generate a fresh inbox through WillItInbox.
- 02
Fix authentication first
SPF, DKIM, and DMARC alignment are receiver gates. If those are broken, content polish will not save the campaign.
- 03
Check DNS and infrastructure
Look for missing PTR, HELO problems, blocklist signals, MX issues, TLS gaps, and suspicious sender infrastructure.
- 04
Review headers, content, and links
List-Unsubscribe, plain-text alternatives, physical address, trigger words, image-to-text ratio, HTTP links, and shorteners all matter.
- 05
Validate the list
Use the email validation docs to suppress invalid addresses and segment risky recipients before volume goes out.
A simple pass/fail rule for launch
- Do not launch with failed DMARC alignment unless the send is intentionally isolated and low risk.
- Do not launch a bulk campaign without List-Unsubscribe and a visible unsubscribe link.
- Do not launch with broken links, HTTP links, or shortened primary CTAs.
- Do not launch to an unvalidated stale list.
For deeper context, read the existing Gmail and Yahoo bulk sender checklist and the WillItInbox report guide.
Frequently asked questions
Keep reading