substack.com
96/100
Mail provider: Unknown
| Check | Details | |
|---|---|---|
| MX | ✔ | mxa.mailgun.org, mxb.mailgun.org |
| SPF | ✔ | v=spf1 include:_spf.google.com include:mailgun.org include:mail.zendesk.com ~all (7 lookups); ~all (softfail) - fine with DMARC; -all is stricter |
| DKIM | ✔ | Selectors found: google (2048-bit+) |
| DMARC | ✔ | v=DMARC1; p=reject; pct=100; rua=mailto:re+kvnosxqvppz@dmarc.postmarkapp.com; sp=reject; aspf=r; |
| MTA-STS | ⚠ | Not set (optional; enforces TLS for mail sent to you) |
| TLS-RPT | ⚠ | Not set (optional; reports TLS delivery failures) |
| BIMI | ℹ | Not set (optional; shows your logo in Gmail/Yahoo; needs DMARC quarantine/reject) |
How to fix it
- No DNS changes needed. 🎉
DNS changes can take up to 24–48 hours. Re-run the check afterwards.
Want it fixed for you? I set up SPF, DKIM and DMARC without breaking your other senders,
with a before/after report.
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Get it fixed on Fiverr
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