posteo.de
Detected Mail Infrastructure: Consumer Email Service Provider
Primary: mx01.posteo.de
Enforces domain sender policy
MailVeri Intelligence Assessment for posteo.de
Verify an email address at posteo.de
Test if a specific recipient mailbox exists and can receive messages without sending any actual email.
Need to clean email lists containing @posteo.de?
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 posteo.de
Q Is posteo.de a disposable email domain?
No. posteo.de is a standard free email domain powered by Consumer Email Service Provider. It is not an ephemeral or disposable burner service.
Q What mail servers (MX records) handle email for posteo.de?
Emails addressed to @posteo.de are processed by 4 authoritative mail exchanger(s), including mx01.posteo.de (priority 10), mx03.posteo.de (priority 10), mx02.posteo.de (priority 10). The mail routing is handled by Consumer Email Service Provider.
Q Does posteo.de have SPF and DMARC email security configured?
Yes. posteo.de has published email authentication records. An SPF record is active (v=spf1 ip4:185.67.36.0/23 ip6:2a05:bc0:1000::/47 ~all) and a DMARC policy is in place (v=DMARC1; p=none; sp=quarantine; adkim=s; aspf=s), protecting the domain against sender address spoofing.
Q Should signups using @posteo.de be allowed or blocked?
Signups using @posteo.de are legitimate consumer email accounts (Consumer Email Service Provider). Accept signups while validating syntax and mailbox status via MailVeri API.
Q How do I verify if an email address on posteo.de exists without sending?
You can verify recipient mailboxes on posteo.de 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.