SpoofCheck
🇫🇷Free email security analysis

Results for proton.me

77B
This domain is protected against spoofing

SPF

Warning
v=spf1 include:_spf.protonmail.ch ~all
Read the guide

DKIM

OK
Selectors: protonmail, protonmail3

DMARC

Warning
v=DMARC1; p=quarantine; fo=1; aspf=s; adkim=s;
Read the guide

MX

OK
mail.protonmail.ch, mailsec.protonmail.ch

MTA-STS

OK
v=STSv1; id=190906205100Z;

Recommendations

  1. 1Upgrade your DMARC policy from p=quarantine to p=reject for full blocking

    With p=quarantine, spoofed emails are sent to spam instead of being blocked outright. Some recipients still check spam folders, and sophisticated attacks can be flagged as legitimate by users. p=reject ensures fraudulent emails never reach any folder.

  2. 2Add rua=mailto:dmarc@yourdomain to your DMARC to receive reports

    Without DMARC reporting (rua=), you have no visibility into who is sending email on behalf of your domain. Aggregate reports let you detect spoofing attempts, identify misconfigured legitimate senders, and confidently tighten your policy over time.

  3. 3Harden your SPF by replacing ~all with -all (hardfail)

    With ~all (softfail), unauthorized senders are flagged but emails are usually still delivered. Switching to -all (hardfail) explicitly tells receiving servers to reject emails from unauthorized sources, providing much stronger protection against spoofing.

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<a href="https://spoofchecker.online/en/email-security/proton.me" target="_blank" rel="noopener"><img src="https://spoofchecker.online/api/badge/proton.me?score=77&grade=B" alt="Email security score for proton.me" height="28"></a>