Email deliverability checker
A self-audit of the signals that decide inbox placement — authentication, warmup, volume, list quality and more. Get a score /100 with prioritised fixes. Free, private, no signup.
Self-audit — tick what you already have set up. This runs entirely in your browser and does NOT query DNS (for the actual records, use the SPF/DKIM/DMARC generator).
- Mailboxes are warmed up before real sending. Ramp new mailboxes slowly (warmup) for 2–4 weeks before cold volume — cold mailboxes that send a burst land in spam.
- SPF record is set for your sending domain. Publish an SPF TXT record that authorises your sending provider — unauthenticated mail gets junked or rejected.
- DKIM signing is enabled. Turn on DKIM with your provider and publish the public key — DKIM is the strongest authentication signal mailbox providers check.
- DMARC policy is published. Add a DMARC TXT record (start at p=none to monitor, then move to quarantine/reject) so receivers know how to handle failures.
- Sending volume per mailbox is capped (roughly 30–50/day). Keep per-mailbox daily volume low and split across multiple mailboxes — high per-mailbox volume is the #1 reputation killer.
- Your list is verified (low bounce risk). Verify every address before sending. A high bounce rate tanks domain reputation fast and is hard to recover from.
- Custom (branded) tracking domain — not the shared provider domain. Use your own CNAME tracking domain. Shared tracking domains carry other senders' reputation and get filtered.
- Dedicated sending domain (not your primary domain). Send cold outreach from a separate domain (e.g. a .co or get-yourbrand.com) so a reputation hit never touches your primary email.
A self-audit tells you what to fix — Autocloz does the fixing: built-in warmup, branded tracking domains, per-mailbox volume caps and live deliverability monitoring.
Warm up + monitor deliverability — start freeDeliverability checker FAQ
Is this a live DNS check?+
No — this is a self-audit you run in your browser. You tick what you already have configured and it scores your setup. To generate the actual SPF, DKIM and DMARC DNS records, use the separate SPF/DKIM/DMARC generator.
What matters most for cold email deliverability?+
Authentication (SPF, DKIM, DMARC) is table stakes, but the biggest movers are warming up new mailboxes before sending, keeping per-mailbox daily volume low, and verifying your list so bounces stay low. This audit weights those highest.
Is the deliverability checker free?+
Yes — free, no signup, 100% client-side. Nothing you tick or type leaves your browser.
Know the gaps? Now close them automatically.
Built-in warmup, branded tracking domains, per-mailbox volume caps and live deliverability monitoring — free to start.