MBP Spotlight: ionos.de

Who hosts what mail? MBP Spotlight
is a new series here at Spam Resource where I’ll break down the top mailbox providers (including B2B) based on their rankings in the top ten million domains. Some entries might have more info, some entries might have less, depending on what information I know about them and what information I can find online.

To count rankings, I took a snapshot of MX records for the top ten million domains, and then rolled them up based on the domain name hosting mail for each domain. That shows me how many domains have their inbound email hosted by hosted by “*.google.com,” “*.outlook.com,” etc.

Number 9 in the rankings: ionos.de

Who is this? The German headquarters of IONOS/1&1

What are they? A German Internet service provider that became known primarily for its web hosting, domain and cloud computing products. The company is part of the United Internet Group.

How much mail do they host? IONOS (Germany) hosts mail for more than 58,593 email domains.

If you’re finding mail rejected when trying to send to ionos.de, here’s where to go for assistance (English, German). Ionos also owns GMX and web.de, and you can find more information on deliverability troubleshooting for these mailbox providers here.

Ranking based on March 2024 data snapshot. Corrections, questions or updates? Contact me.
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