protonmail.ch
Detected Mail Infrastructure: Proton Mail
Primary: mail.protonmail.ch
Enforces domain sender policy
MailVeri Intelligence Assessment for protonmail.ch
Verify an email address at protonmail.ch
Test if a specific recipient mailbox exists and can receive messages without sending any actual email.
Need to clean email lists containing @protonmail.ch?
DNS checks confirm mail server availability, but cannot detect full inboxes, deleted mailboxes, or stealth spam traps. MailVeri verifies recipient mailbox deliverability in real time with 99% accuracy and non-intrusive SMTP handshakes.
Mail Exchanger (MX) Records
Active inbound mail routes resolved from authoritative DNS:
SPF & DMARC Authentication
Sender Policy Framework (SPF):
Domain-based Message Authentication (DMARC):
Frequently Asked Questions about protonmail.ch
Q Is protonmail.ch a disposable email domain?
No. protonmail.ch is a standard free email domain powered by Proton Mail. It is not an ephemeral or disposable burner service.
Q What mail servers (MX records) handle email for protonmail.ch?
Emails addressed to @protonmail.ch are processed by 2 authoritative mail exchanger(s), including mail.protonmail.ch (priority 5), mailsec.protonmail.ch (priority 10). The mail routing is handled by Proton Mail.
Q Does protonmail.ch have SPF and DMARC email security configured?
Yes. protonmail.ch has published email authentication records. An SPF record is active (v=spf1 include:_spf.protonmail.ch ~all) and a DMARC policy is in place (v=DMARC1; p=quarantine; fo=1; aspf=s; adkim=s;), protecting the domain against sender address spoofing.
Q Should signups using @protonmail.ch be allowed or blocked?
Signups using @protonmail.ch are legitimate consumer email accounts (Proton Mail). Accept signups while validating syntax and mailbox status via MailVeri API.
Q How do I verify if an email address on protonmail.ch exists without sending?
You can verify recipient mailboxes on protonmail.ch in real time using the MailVeri API. It checks domain deliverability, mailbox existence via low-latency SMTP handshakes (<500ms), and catch-all status without sending actual emails.