Stop wondering where your emails are landing. These deliverability tools help you track sender reputation, verify authentication, detect inbox risks, and optimize email performance so more messages reach the inbox and drive results.
Check one address, or up to 50 at once: valid, catch-all, invalid or risky — with the reason and a CSV to download.
Check a mailbox server's IMAP ports, TLS and login policy — or sign in and open your INBOX.
Test any mail server's ports, TLS and relay policy — or log in with your own SMTP details.
Every DNS record for a domain in one scan — A to SRV, plus SPF, DKIM and DMARC.
12 blocklists including Spamhaus, each verified as answering before it counts — so “clean” means clean.
Highlights the phrases filters react to, offers wording that is not flagged, and scores your draft beside the rewrite.
Scans All DKIM selectors across Google, Microsoft, Zoho, SendGrid, Mailchimp, Klaviyo, HubSpot and more, and shows every platform signing as you.
Names the platform that sent a message, checks whether SPF and DKIM align with the From domain, and walks the delivery path hop by hop.
Names your mail provider, resolves every server, and connects to each one to confirm it really answers.
Checks every sending IP both ways — a PTR that does not resolve back is treated as no PTR at all.
Instantly see the public IP address your browser is using to reach this site.
Works out domain age — a top spam signal — warns on expiry, and translates the registry status codes.
Check authoritative NS records to confirm which provider controls a domain's DNS zone.
Paste a list or upload a CSV and see who runs each mailbox — Gmail, Microsoft 365, Zoho, GoDaddy, or a gateway like Mimecast in front.
Checks your live DNS against what Gmail, Microsoft, Yahoo and Apple each require from a bulk sender.
Generate a tracking code, send test emails to your seed inboxes, and analyze inbox placement with a comprehensive scorecard report.
Runs 21 checks on your HTML — Gmail clipping, Outlook rendering, alt text, missing unsubscribe — and previews it at desktop and phone width.
Enter your domain. We read SPF, DKIM, DMARC and blocklists, then order what to fix by what is actually costing you the inbox.
Verify IPv4 addresses (A records) point to the correct mail servers and resources.
Check IPv6 addresses (AAAA records) for modern email infrastructure support.
Scans the aliases senders use — tracking, return paths, DKIM — and follows each to where it really ends.
Reads every TXT record and says what each is for, counts your SPF against the ten-lookup limit, and grades your DMARC.
Start with our free tools to get instant insights, then upgrade to premium features for comprehensive monitoring and expert guidance.