Running 25+ DNS checks against your domain — usually 2-3 seconds…
Running 25+ DNS checks against your domain — usually 2-3 seconds…
Domain check / postmark.com
Last checked just now
Free email deliverability report for postmark.com. SPF, DKIM, DMARC, MX, BIMI, MTA-STS, and a 15-blacklist sweep.
DOMAIN HEALTH
postmark.com
5 ISSUES
2 critical
SPF
not found
DKIM
Probed 38 selectors, none found
DMARC
not published
MX
no MX records
BIMI
not published
MTA-STS
not published
Your domain has no SPF record. Most modern receivers will reject or junk your mail.
FIX
Add a TXT record at your root domain listing your actual sending service, e.g. "v=spf1 include:_spf.google.com -all" (adjust for your sender). We can't generate this for you automatically because we could not detect your email provider — publishing a Google-only record would hard-fail every other legitimate sender.
Without DMARC you cannot tell receivers what to do when SPF/DKIM fails. Gmail and Yahoo require DMARC for any sender doing more than 5,000 messages per day to their users.
FIX
Add a TXT record at _dmarc.<your-domain> with: "v=DMARC1; p=quarantine; rua=mailto:dmarc@your-domain; adkim=r; aspf=r;"
We could not find a published DKIM key under any common selector. Modern receivers (Gmail, Outlook, Apple) weight DKIM heavily.
FIX
Configure DKIM signing on your domain and publish the public key as a TXT record at <selector>._domainkey.<your-domain>.
Your domain has no MX records. Inbound mail will fail. (This is fine if the domain is send-only or doesn't receive mail at all — but in that case prefer a null MX, see fix.)
FIX
If this domain receives mail, configure MX records pointing to your mail provider. If it never receives mail, publish a null MX ("0 .") to explicitly signal that.
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THE FIX
We found 5 issues on postmark.com. Want us to fix it and keep it fixed? Connect your inbox and we handle the rest: authentication, warm-up, and a deliverability gate on every send.
Fix this free →This page shows the current deliverability posture of postmark.com. Check your own domain free, or connect your inbox and we fix it and keep it fixed.
MTA-STS protects against downgrade attacks during SMTP delivery. Recommended for serious senders.
FIX
Publish an MTA-STS policy at mta-sts.<your-domain> and a TXT record at _mta-sts.<your-domain>.