Before a single word of your email is read, a machine on the other side asks three questions about your domain: is this sender allowed, is the message signed, and what do I do if the answer is no. Get one of them wrong and your campaign is filtered on identity — not on your offer, not on your writing, and not on your list. Press the button and find out in about a second.
None of them are about your message. All of them are decided before it is opened.
A published list of the servers permitted to send as you. Miss it and you look like a stranger wearing your own name. Exceed the ten-lookup budget it is evaluated under — which happens quietly, every time you connect another tool — and the whole record is thrown away as if you never had one.
A cryptographic signature proving the message left your systems untouched. It is the only authentication that survives being forwarded, and it is the strongest single signal you own. Most domains that "have deliverability issues" simply are not signing.
Your standing instruction to every receiver on earth. Left on monitor-only it enforces nothing and protects nothing — while the largest mailbox providers now expect anyone sending in volume to be enforcing. Until you are, someone else can send mail as you, and you will not even get the report.
Outbound gets blamed for the wrong failure constantly. A list is called cold, copy is rewritten four times, an agency is fired — when the actual cause was a missing record that takes eleven minutes to publish.
The audit is the free half. The other half is that we run it as a gate: no campaign of ours leaves a domain that has not passed.
Buy the list. Write the sequence. Send five thousand. Watch a two percent open rate. Blame the copy. Rewrite. Send again. Never once ask whether the mail was allowed in the building.
Audit the domain in a second. Publish three records. Warm it properly. Then send — and find out what your offer is actually worth, measured against people who were given the chance to read it.
Real. The page calls a live service that performs public DNS lookups at the moment you press the button, including following the chain of nested references inside your sender list to count them the way a receiving server counts them. What you see is what a mail server sees.
The audit probes the sixteen naming conventions the mainstream providers use. A domain signing on a private or rotating name will not be detected, and that is worth knowing in itself: publish on a conventional name and every diagnostic tool in the industry — including the ones your prospects' IT teams run — can see you are legitimate.
No, and be suspicious of anyone who says otherwise. Authentication is the ticket to be judged on merit. After it come volume discipline, list quality, engagement and content. What it does guarantee is that you stop losing messages for a reason that has nothing to do with any of those.
Yes. We publish the records, split your outbound onto its own authenticated domains, warm them, and then run the campaign on top — with the audit repeating as a standing gate so it cannot silently break later.
Text Rudy the words INBOX KEY and we will audit every domain you send from, publish what is missing, and hand you back the report.
TEXT RUDY: INBOX KEY🍪 We use cookies and similar technologies to run this site, remember your preferences, measure traffic, and improve your experience — and some tools help us understand which businesses visit us. By clicking Accept you agree to this use. You can decline non-essential cookies anytime. See our Privacy Policy.