Tool demos
Short videos of the free WarmInboxes deliverability tools: what you paste in, what comes back, and what to do with it. One per tool, under a minute each.
All 15 tool demos
One short video per free tool: what you paste in, what comes back, and what to do with it.
- Is Your Domain Blacklisted? Check 20 Blacklists Free — A 60-second walkthrough of the free Warm Inboxes blacklist checker: paste a domain or IP, see every major blacklist it appears on, and find out what to do about a listing before it costs you a campaign.
- Grade Your Email Deliverability A to F (Free Tool) — A 60-second walkthrough of the free Warm Inboxes deliverability checker: grade any sending domain A to F across SPF, DKIM, DMARC, MX, blacklists and domain age, and see exactly which record is dragging the score down.
- Will Your Cold Email Land in Spam? Free Spam Checker — A short walkthrough of the free Warm Inboxes spam checker: paste a subject and body, see the weighted spam triggers it finds, and fix them before the send.
- Split Your Lead List by Google vs Outlook (Free) — A short walkthrough of the free Warm Inboxes ESP segmentation tool: upload a lead list, split it by Google, Microsoft and gateway inboxes, and see how many mailboxes each segment needs.
- How Many Cold Email Inboxes Do You Need? — A short walkthrough of the free Warm Inboxes infrastructure calculator: enter a daily send target and get the number of inboxes and domains it takes, with the monthly cost.
- Free Nameserver Checker: Find Any Domain's DNS Host — A short walkthrough of the free Warm Inboxes nameserver checker: look up the NS records for one domain or a whole CSV and see which DNS host each one points at.
- Are the Links in Your Emails Blacklisted? SURBL Check — A short walkthrough of the free Warm Inboxes SURBL checker: bulk-check the domains in your links against the SURBL URI blocklist before they cost you a campaign.
- Can This Domain Use Google Workspace? Check Free — A short walkthrough of the free Warm Inboxes Google domain checker: see whether a domain is already tied to a Google Workspace account before you try to sign it up.
- Free Email Verifier: Is This Address Real? — A short walkthrough of the free Warm Inboxes email verifier: paste addresses and see which are valid, risky or invalid from syntax, MX, disposable and role checks.
- Generate SPF, DKIM and DMARC Records in Seconds — A short walkthrough of the free Warm Inboxes record generator: pick your sending platform and get correct SPF, DKIM and DMARC records to paste into DNS.
- Domain Expiry Checker: Don't Lose Your Sending Domains — A short walkthrough of the free Warm Inboxes domain expiry checker: check the expiration dates on your sending domains and catch a renewal before it lapses.
- Free DNS Checker: MX, TXT, CNAME and A Records — A short walkthrough of the free Warm Inboxes DNS checker: query MX, TXT, CNAME, A and the other record types for any domain in one lookup.
- Free DKIM Checker: Is Your Email Actually Signed? — A short walkthrough of the free Warm Inboxes DKIM checker: scan the common selectors for a domain and validate the signing key it publishes.
- Free SPF Checker: Stop Your SPF Record Breaking Email — A short walkthrough of the free Warm Inboxes SPF checker: look up a domain’s SPF record, count its DNS lookups against the limit, and see what would break it.
- Free DMARC Checker: Is Your DMARC Record Working? — A short walkthrough of the free Warm Inboxes DMARC checker: validate a domain’s DMARC record, read its policy and tags, and see what the verdicts mean.