Running 25+ DNS checks against your domain — usually 2-3 seconds…
Running 25+ DNS checks against your domain — usually 2-3 seconds…
Domain check / protonmail.com
Last checked just now
Free email deliverability report for protonmail.com. SPF, DKIM, DMARC, MX, BIMI, MTA-STS, and a 15-blacklist sweep.
DOMAIN HEALTH
protonmail.com
3 ISSUES
0 critical
SPF
v=spf1 include:_spf.protonmail.ch ~all
DKIM
Probed 38 selectors, none found
DMARC
p=quarantine
MX
mail.protonmail.ch, mailsec.protonmail.ch
BIMI
no VMC
MTA-STS
policy present
Proton Mail uses three rotating selectors (protonmail, protonmail2, protonmail3) configured as CNAMEs on your domain.
FIX
Proton Mail uses three rotating selectors (protonmail, protonmail2, protonmail3) configured as CNAMEs on your domain.
You will not receive aggregate reports showing who is sending mail as your domain.
FIX
Add rua=mailto:dmarc@your-domain (or our ingestion endpoint) to your DMARC record.
Your SPF policy is ~all. Because your DMARC policy is at enforcement, DMARC already acts on alignment failures regardless of the SPF qualifier, so this is informational. Tighten to -all once your sources are confirmed.
FIX
Once you are confident your SPF is correct, harden the policy to -all (hard fail).
Click your AI assistant of choice — the report is pre-loaded, just hit enter.
THE FIX
We found 3 issues on protonmail.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 protonmail.com. Check your own domain free, or connect your inbox and we fix it and keep it fixed.