proton.me
Live email deliverability and anti-spoofing audit. Every value below was read from public DNS at the moment this page was generated.
90/100 — This domain is configured correctly for both sending and receiving. Accepts mail · Protected against spoofing · Hosted by Proton Mail
Findings
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spf
SPF ends in ~all (softfail); unauthorised mail is marked rather than rejected.
v=spf1 include:_spf.protonmail.ch ~all
Fix: Move to -all once you have confirmed all senders are listed.
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dmarc rua
DMARC has no rua address, so you receive no aggregate reports and are flying blind.
v=DMARC1; p=quarantine; fo=1; aspf=s; adkim=s;
Fix: Add rua=mailto:dmarc@proton.me to the record.
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mx
Mail is handled by Proton Mail.
10 mail.protonmail.ch, 20 mailsec.protonmail.ch
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dmarc
DMARC is enforcing with p=quarantine.
v=DMARC1; p=quarantine; fo=1; aspf=s; adkim=s;
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dkim
DKIM keys found for 1 selector.
protonmail._domainkey
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mta sts
MTA-STS is published, so senders will refuse to downgrade to plaintext SMTP.
v=STSv1; id=190906205100Z;
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tls rpt
TLS reporting is enabled.
v=TLSRPTv1; rua=https://reports.proton.me/reports/smtptls
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bimi
BIMI is published; supporting clients can show your logo.
v=BIMI1; l=; a=;
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dnssec
DNSSEC is validating, so these records cannot be silently tampered with in transit.
AD flag set
Records
| MX | 10 mail.protonmail.ch20 mailsec.protonmail.ch |
|---|---|
| SPF | v=spf1 include:_spf.protonmail.ch ~all |
| DMARC | v=DMARC1; p=quarantine; fo=1; aspf=s; adkim=s; |
| DKIM selectors | protonmail |
| MTA-STS | published |
| TLS-RPT | published |
| BIMI | published |
| DNSSEC | validating |
Same data, as JSON, in one request. No SMTP probing, no stored recipient data, 250 free calls a month.
curl "https://www.mailgrade.dev/v1/domain?domain=proton.me"
Also available: /v1/verify?email=… for individual addresses, and
/v1/verify/batch for lists.