Free Email Deliverability Checker Will Your Email Reach the Inbox?
Before you scale volume, confirm the foundations. This checker audits the deliverability stack for a sending domain authentication records, mail routing, blacklist status and tells you whether the domain is ready for cold outreach or what to fix first.
How this check works
- 01
Runs the same live DNS checks as the Domain Health Checker, weighted toward sending readiness.
- 02
Grades authentication strength: SPF strictness, DKIM presence, DMARC enforcement level.
- 03
Outputs a verdict: Ready, Fix before sending, or Do not send.
How to fix common problems
New domain, no warm-up
Even a perfect technical setup needs 2–4 weeks of warm-up (ramping volume with engagement) before cold campaigns. Filters distrust brand-new sending domains.
Verdict: fix before sending
Work the flagged items top-down. Authentication fixes are DNS changes usually same-day.
Example
Domain passes all checks → 'Ready'. Pair with 2–4 weeks of warm-up on new domains, keep daily volume per mailbox under ~30 cold emails, and monitor complaint rates.
FAQ
- What affects email deliverability most?
- Sender reputation (complaints, bounces, engagement), authentication (SPF/DKIM/DMARC), list quality, and content roughly in that order for established senders.
- How many cold emails can I send per day?
- Per mailbox: ~20–30 cold emails/day is the safe ceiling. Scale by adding mailboxes and domains, not by pushing one mailbox harder.
- Why do emails go to spam even with SPF and DKIM?
- Authentication passes but reputation fails: high complaints, low engagement, a young domain, or spam-pattern content. Use the Spam Checker on copy next.
Want this handled end-to-end?
We build and run the whole outbound system infrastructure, lists, and copy live in 10 days.
See the cold email system