mailX

Why are my emails going to spam? Ask Claude, and mailX checks your domain live and tells you exactly what to fix. One request runs a full deliverability audit of any domain: SPF, DKIM, DMARC, blacklists and MX, with a pass or fail for each check and the fixes in priority order. No account, no API key, no setup. Try asking: - "Our emails from acme.com keep going to spam. What's wrong?" - "Is DKIM set up correctly for acme.com? I don't know the selector." - "Generate the SPF and DMARC records for acme.com. We use Google Workspace." - "Is our domain on a blacklist?" - "What SMTP settings do I use for Microsoft 365?" What mailX checks: - SPF, DKIM, DMARC and BIMI, with the exact record found and how to fix it - Whether your domain has the SPF, DKIM and DMARC records Gmail, Yahoo and Outlook require from bulk senders - DKIM selector detection, so you don't need to know yours - Major blocklists such as Spamhaus, Barracuda and SpamCop - MX, TXT, CNAME, PTR and full DNS lookups - SPF and DMARC records ready to paste at your DNS provider, with guidance for Google Workspace, Microsoft 365, SendGrid, Mailgun, Amazon SES and more - SMTP and IMAP settings for common email providers Made for founders, marketers, sales teams sending cold email, and IT admins. Every tool is read-only: mailX reads public DNS, never changes your DNS, never sends email and never asks for passwords. Built by Mailwarm Inc. (YC S20), an email deliverability company.