Check Gmail, Outlook & Yahoo requirements
Start with a free DNS precheck of your sending domain. To verify authentication on an actual sent message, add a test message in your account.
Free DNS precheck
This checks published DNS prerequisites. This form does not receive test messages or assess an actual sent message.
Public DNS and limited HTTPS checks run in the background; no SMTP, mailbox or tenant access. A shared five-minute domain cooldown also applies to the domain check.
Completed public checks may temporarily appear in the weekly overview with domain, Domain Trust rating and time. Verified owners can opt out. Private account findings remain private.
Technical snapshot only: no legal, GDPR, NIS2 or ISO certification and no guarantee of delivery or inbox placement.
Check a real test message in your account
Select your verified sending domain in your account. When the test receiver is ready, you can provide an individual receiving address, send to it from your sending system and assess the message against provider requirements.
Open test message checks in your accountSign-in and a verified domain you own are required. The test receiver must be available; your account allowance applies. Messages and results remain private.
Consider additional security separately
DNSSEC, DANE, MTA-STS and TLS-RPT are additional security topics. They are not treated as universal Gmail, Outlook or Yahoo obligations here. Inbound MX and TLS do not demonstrate the properties of every outbound mail path.