Cold email deliverability audit
Every check on this site at once, for a domain you are about to send from. It takes about a second and touches nothing but DNS.
Run it on the domain you send FROM, not the one you sell to
Deliverability is decided by the sending domain's records. Checking a prospect's domain tells you whether they can receive mail; checking yours tells you whether yours will arrive.
What this cannot tell you
Nothing here predicts whether a specific mailbox exists, and on Google- or Microsoft-hosted domains nothing can. It also says nothing about your reputation with a given receiver, which is earned by the mail you have already sent. Clean records are the floor, not the ceiling.
The checks we run on our own domains
These are the same checks that found that growfast.sh has no MX record and a p=none DMARC policy, and that seobolt.app has no DMARC record at all. Both are ours. The tool was built because we needed it.
Other checks
- SPF checkerReads the live SPF record, resolves every include it points at, and counts the DNS lookups. Over ten, receivers stop evaluating your SPF entirely.
- DMARC checkerReads the record at _dmarc on your domain and explains the policy it publishes — including the cases where a record exists but does nothing.
- MX lookupResolves the MX records and names the provider behind them — which decides whether an address on this domain can be checked before you send to it.