SenderSuccess tests your authentication, content, and sender reputation the moment you hit send — then tells you precisely what to change, not just what's wrong.
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Every bounce or spam-foldered email is a customer who never got your message — no error, no bounce notice back to you, just silence on the other end.
Deliverability compounds. Each complaint, each stale list, each misconfigured record chips away at the sender reputation every future email depends on.
Finding out after a launch is too late. Testing before you send is the only way to actually know — not guess.
Generate a unique test address, send a real email from your real sending setup — your ESP, your CRM, your own mail server — and get a composite SenderSuccess Score across four categories: Authentication, Content, Compliance, and Reputation. Every check shown, every point explained.
Every test checks your sending IP against Spamhaus, Barracuda, SORBS, and SpamCop in real time — plus PTR/forward-confirmed reverse DNS, MX records, and HELO validity. No simulated results: real DNS lookups, every time.
A real local spam-scoring engine, not a guess — plus spam-trigger phrase detection, link-to-text ratio, image-to-text ratio, and checks for broken, shortened, or IP-literal links. The same patterns that get real mail filtered.
Every failed or borderline check ships with an exact, technical suggestion built from your own real evidence — not boilerplate advice you'd find in a 2011 blog post.
You've got one shot at a product launch. Test the exact template and sending domain a week out, not after open rates already tanked.
New customer, new sending subdomain, new SPF/DKIM setup — verify every domain your platform sends from before it reaches a real inbox.
Ten clients, ten sending domains, ten different reputations to track. Run one test per domain and know instantly which ones need attention.
Cold email lives or dies on inbox placement. Check every new sending alias before a rep burns their first send on it.
Migrated mail servers, rotated an IP, changed an SPF include? Confirm nothing broke in the two minutes it takes to send a test.
If your business depends on email reaching an inbox, this is built for you too. Run a test — it takes less time than reading this card.
Runs on infrastructure you control. Test emails and results live on your own server, not a third party's.
Every check is a real DNS lookup or a real local spam-engine score — never a mocked or cached result.
No credit card for your first test. Create a free account when you want more.
"We caught a broken DKIM selector on a new subdomain before a single campaign went out. That's a save I don't want to calculate the cost of."
"Our agency runs a SenderSuccess check on every client domain before onboarding. It's the fastest 'is this actually going to work' answer we've found."
"I don't need to know what a DMARC alignment mode is — SenderSuccess just tells me what to change, in plain English."
Yes — generate a test address (or paste a raw email) and get your first SenderSuccess Score with no signup and no credit card. Create a free account for unlimited daily tests and full reports by email.
Four categories: Authentication (SPF, DKIM, DMARC, PTR, MX, HELO), Content (spam-engine score, trigger phrases, link and image ratios), Compliance (unsubscribe link/header, physical address), and Reputation (real-time blacklist checks).
No. Either send a real email to a generated test address from whatever system you already send from, or paste a complete raw message you already have — the report appears in your browser either way.
No — each test is private to the account (or anonymous session) that created it.
Every test evaluates one message end-to-end — send from every sending source you use (marketing platform, transactional service, personal client) to get a full picture of your domain's deliverability.
Run your first SenderSuccess test free — right now, above.