Will Gmail, Microsoft & Yahoo accept your mail?
Check your domain's sender readiness against the major mailbox providers' requirements — from public DNS, in seconds.
What this checks
Gmail, Yahoo and Microsoft now enforce sender requirements — SPF, DKIM and DMARC — and reject non-compliant mail (Gmail began SMTP rejections in November 2025; Microsoft returns 550 5.7.515). This tool assesses what’s visible in your public DNS.
Why some checks say “requires telemetry”
Whether your legitimate senders actually pass — alignment, DKIM signing coverage, spam-rate and reputation — can’t be seen from DNS. It comes from your DMARC aggregate reports. Connect reporting and the full platform identifies each sender, tells you exactly what blocks safe enforcement, and helps you fix it without breaking real mail.