Ten free tools. No account, no card.
Authentication is the entry ticket and warming builds on top of it. Check the records a provider reads, generate the ones you are missing, and score a template before it goes out.
Email Authentication Checker
Audits SPF, DKIM, DMARC, MX and BIMI for any domain in one lookup, and flags lookup overflow, weak DKIM keys and a missing DMARC policy.
SPF · DKIM · DMARC · MX · BIMI02Blacklist Checker
Queries the 21 most common email blacklists for a domain or IP. A listing links straight to its delisting guide.
21 lists03Free Email Deliverability Test
Your email scored for spam signals, then sent and reported provider by provider: inbox, promotions or spam. Signup, no card, results by email.
Inbox · Promotions · Spam04Domain Reputation Checker
One report on everything public about a domain's standing: blacklists, SPF, DKIM, DMARC, MX, reverse DNS and the registration date, with a fix order and links to Postmaster Tools and SNDS.
Blacklists · Auth · PTR · Age05Email Template Analyzer
Scores the subject line and the body separately, names the evidence and the fix for every finding, and previews the email as an iPhone notification, in Gmail and in Outlook.
Two scores · Email previewSPF Record Generator
Pick the services that send for your domain, set the enforcement policy, and copy a valid SPF TXT record.
TXT record07DKIM Record Generator
Formats your selector and public key into a ready-to-publish DKIM TXT record.
TXT record08DMARC Record Generator
Choose none, quarantine or reject, set up aggregate reporting, and copy the DMARC record.
TXT recordSPF, DKIM and DMARC decide whether a provider can tell your mail from a spoof. Most new domains have one missing.
Publish the exact record the generator gives you. A listing on a blacklist has its own delisting guide.
Authentication gets you in the door. Reputation, built by an AI Agent in real threads, is what keeps your mail in the inbox.
Records fixed? Warm the domain next.
An AI Agent on every mailbox, real threads across the MailStrike network, and a Free Deliverability Test to see where your mail lands today.