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Email infrastructure of 1und1.de

According to Live Direct Marketing's daily DNS scan (July 13, 2026), 1und1.de (Tranco rank #6,491) receives mail via 1&1 IONOS. Its DMARC policy is p=quarantine — one of the minority (47%) of DMARC publishers that actually enforce.

Mailbox provider (MX)	1&1 IONOS
ESPs in SPF	none detected
SaaS senders in SPF	Zimpel (Cision)
DMARC policy	p=quarantine
DMARC record	`v=DMARC1;p=quarantine;sp=quarantine;pct=100;rua=mailto:7f750aff40@rua.easydmarc.eu;ri=86400;aspf=r;adkim=r`
Tranco rank	#6,491
Snapshot	2026-07-13 (updated daily)

Frequently asked questions

What email provider does 1und1.de use?

1und1.de uses 1&1 IONOS for inbound mail (detected from its primary MX record) as of July 13, 2026, per Live Direct Marketing's daily Tranco top-1M scan.

Does 1und1.de enforce DMARC?

Partially — 1und1.de publishes p=quarantine (as of July 13, 2026).

DNS records say who should deliver your mail — they don't say whether it lands in the inbox. Run a free inbox placement test for 1und1.de at Gmail, Outlook, Yandex and Mail.ru.

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