Sales outreach
All 2,838 of these sites already run Heinlein Support (mailbox.org), with the information technology and services segment leading at 10 sites. Pitch the products and services that fit that exact stack.
Websites using Heinlein Support (mailbox.org)
MX & Email Hosting Services Email Hosting Visit website
Heinlein Support offers specialized business email hosting, facilitating large mailboxes, custom platform integration, and high-volume secure email delivery solutions for diverse needs.
Up to 1M sites per list · Segment by country & TLD to cover the full footprint · Unlimited report rebuilds for 1 month
- Live websites detected
- 2,838
- Countries with usage
- 19
- Top market: Germany
- 🇩🇪 95.8%
Heinlein Support (mailbox.org) global heatmap
darker = more sitesHeinlein Support (mailbox.org) usage by country
by sites detected-
01 🇩🇪 Germany 2,718 95.8%
-
02 🇺🇸 United States 33 1.2%
-
03 🇦🇹 Austria 28 1%
-
04 🇨🇭 Switzerland 15 0.5%
-
05 🇫🇮 Finland 9 0.3%
-
06 🇮🇹 Italy 6 0.2%
-
07 🇬🇧 United Kingdom 6 0.2%
-
08 🇳🇱 Netherlands 4 0.1%
-
09 🇫🇷 France 4 0.1%
-
10 🇧🇪 Belgium 3 0.1%
And 9 more countries in the full dataset.
Need every Heinlein Support (mailbox.org) site in one market? Unlock Heinlein Support (mailbox.org) once and rebuild filtered reports as often as you like for a month: by country, TLD, or stack combination, each with up to 20 data points per site.
Start from $39/moHeinlein Support (mailbox.org) usage by country group
by sites detected-
01 European Union (EU) 12 countries 2,779 97.9%
-
02 DACH 3 countries 2,761 97.3%
-
03 English-Speaking Countries 3 countries 40 1.4%
-
04 North America 3 countries 35 1.2%
-
05 French-Speaking Countries 3 countries 22 0.8%
-
06 Nordics 3 countries 11 0.4%
-
07 Benelux 2 countries 7 0.2%
-
08 Eastern Europe 4 countries 5 0.2%
-
09 BRICS 2 countries 3 0.1%
-
10 Latin America (LATAM) 1 country 2 0.1%
Country groups overlap: a country can belong to several at once (Germany counts toward Europe, Western Europe, the EU and DACH). Percentages are each group's share of the 2,838 sites with a known country, so they describe overlapping views of the same data and do not add up to 100%.
Top websites using Heinlein Support (mailbox.org)
by popularity| # | Website | Popularity | Country | TLD |
|---|---|---|---|---|
| 01 |
|
5,178 | 🇩🇪 Germany | org |
| 02 |
|
122,463 | 🇩🇪 Germany | de |
| 03 |
|
128,322 | 🇩🇪 Germany | de |
| 04 |
|
212,155 | 🇩🇪 Germany | de |
| 05 |
|
217,395 | 🇩🇪 Germany | de |
| 06 |
|
218,974 | 🇩🇪 Germany | de |
| 07 |
|
224,147 | 🇩🇪 Germany | de |
| 08 |
|
245,005 | 🇩🇪 Germany | de |
| 09 |
|
266,915 | 🇨🇭 Switzerland | ch |
| 10 |
|
332,564 | 🇩🇪 Germany | de |
| 11 |
|
338,154 | 🇩🇪 Germany | de |
| 12 |
|
366,783 | 🇩🇪 Germany | de |
| 13 |
|
403,443 | 🇩🇪 Germany | eu |
| 14 |
|
405,552 | 🇩🇪 Germany | ch |
| 15 |
|
428,781 | 🇩🇪 Germany | de |
| 16 |
|
433,194 | 🇩🇪 Germany | de |
| 17 |
|
437,078 | 🇩🇪 Germany | org |
| 18 |
|
450,595 | 🇩🇪 Germany | de |
| 19 |
|
458,965 | 🇩🇪 Germany | eu |
| 20 |
|
475,996 | 🇩🇪 Germany | de |
This is 20 of 2,838 websites. Download up to 1M sites per list as CSV, enriched with firmographics.
Download the full listCompanies using Heinlein Support (mailbox.org)
sample, enriched| Company | Website | Employees | Industry | Country | Founded |
|---|---|---|---|---|---|
| Global Innovation Gathering |
|
11-50 | Information Technology And Services | 🇩🇪 Germany | 2013 |
| Naehr Engel Gmbh |
|
201-500 | Food & Beverages | 🇩🇪 Germany | - |
| Linke Medienakademie |
|
1-10 | - | 🇩🇪 Germany | - |
| Prg Präzisions-rührer Gmbh |
|
51-200 | Machinery | 🇩🇪 Germany | 1981 |
| Iqst — Center For Integrated Quantum Science And Technology |
|
201-500 | Higher Education | 🇩🇪 Germany | 2014 |
| 3achs |
|
1-10 | - | 🇩🇪 Germany | - |
| Asta Hochschule Darmstadt |
|
11-50 | Higher Education | 🇩🇪 Germany | - |
| Psz Düsseldorf |
|
51-200 | Hospital & Health Care | 🇩🇪 Germany | 1987 |
| Prif Peace Research Institute Frankfurt |
|
51-200 | Think Tanks | 🇩🇪 Germany | 1970 |
| ärzte Ohne Grenzen Deutschland/ Médecins Sans Frontières |
|
201-500 | Non-profit Organization Management | 🇩🇪 Germany | - |
| Agrecol E.v. |
|
11-50 | Farming | 🇩🇪 Germany | 1988 |
| European Work In Progress Cologne |
|
1-10 | Music | 🇩🇪 Germany | 2018 |
| Goetheanum |
|
51-200 | Civic & Social Organization | 🇨🇭 Switzerland | 1923 |
| Lekarze Bez Granic |
|
11-50 | Non-profit Organization Management | 🇵🇱 Poland | 1971 |
| Bund Deutscher Pfadfinderinnen |
|
1-10 | - | 🇩🇪 Germany | - |
| Bundjugend Schleswig-holstein |
|
1-10 | - | 🇩🇪 Germany | - |
| Bund Evangelisch-freikirchlicher Gemeinden In Deutschland K.d.ö.r. |
|
51-200 | Religious Institutions | 🇩🇪 Germany | - |
| Psyplan |
|
11-50 | Management Consulting | 🇩🇪 Germany | - |
| Baptisten (befg) |
|
11-50 | Religious Institutions | 🇩🇪 Germany | - |
| Cultuzz Digital Media Gmbh |
|
51-200 | Internet | 🇩🇪 Germany | 2000 |
| Ernst Huber Wärmetechnik Gmbh |
|
1-10 | - | 🇩🇪 Germany | - |
| Rheinwerk Verlag Gmbh |
|
51-200 | Publishing | 🇩🇪 Germany | 1999 |
| Kontor Freiraum |
|
1-10 | Management Consulting | 🇩🇪 Germany | 2018 |
| Rüstungsinformationsbüro E.v. |
|
11-50 | Civic & Social Organization | 🇩🇪 Germany | - |
| Versöhnungsbund E.v. |
|
1-10 | - | 🇩🇪 Germany | - |
| Heureka Gmbh – Einfach Kommunizieren. |
|
11-50 | Marketing And Advertising | 🇩🇪 Germany | 1989 |
| Gp Lange Gartenbau & Projektmanagement Gmbh |
|
1-10 | Facilities Services | 🇩🇪 Germany | - |
| Kommune Niederkaufungenkommune Niederkaufungen |
|
11-50 | Primary/secondary Education | 🇩🇪 Germany | - |
| Netzwerk Für Demokratische Kultur E.v. |
|
1-10 | Motion Pictures And Film | 🇩🇪 Germany | - |
| Entwicklungspolitisches Netzwerk Sachsen E.v. |
|
11-50 | International Trade And Development | 🇩🇪 Germany | - |
| Theologische Hochschule Elstal |
|
1-10 | Higher Education | 🇩🇪 Germany | - |
| ökumenisches Informationszentrum Dresden |
|
11-50 | Individual & Family Services | 🇩🇪 Germany | - |
| W3 - Werkstatt Für Internationale Kultur Und Politik E.v. |
|
11-50 | Restaurants | 🇩🇪 Germany | - |
| Millin Nicolaus Verlag Gmbh Computerbücher |
|
1-10 | Publishing | 🇩🇪 Germany | - |
| Lobbycontrol |
|
11-50 | Package/freight Delivery | 🇩🇪 Germany | 2005 |
| Blue 21 |
|
1-10 | - | 🇩🇪 Germany | - |
| Epiz |
|
11-50 | Museums And Institutions | 🇩🇪 Germany | - |
| Heilpraktikschule In Selbstverwaltung |
|
1-10 | - | 🇩🇪 Germany | - |
| Antidiskriminierungsbüro Sachsen |
|
11-50 | Political Organization | 🇩🇪 Germany | 2004 |
| Cubus42 Seminare Für Neue Technologien |
|
1-10 | Mechanical Or Industrial Engineering | 🇩🇪 Germany | - |
A sample of enriched company profiles. Full exports include company, social, and spend signals on every domain.
Heinlein Support (mailbox.org) usage by industry
by TLD segment-
01 Information Technology And Services 10 12%
-
02 Civic & Social Organization 8 9.6%
-
03 Management Consulting 6 7.2%
-
04 Marketing And Advertising 5 6%
-
05 Publishing 5 6%
-
06 Non-profit Organization Management 5 6%
-
07 Internet 5 6%
-
08 Higher Education 4 4.8%
-
09 Museums And Institutions 4 4.8%
-
10 Hospitality 4 4.8%
Heinlein Support (mailbox.org) industry distribution chart
share by domain segmentTechnologies related to Heinlein Support (mailbox.org)
Email HostingPut it to work
What teams do with the Heinlein Support (mailbox.org) list
Competitor analysis
Selling SPF (Sender Policy Framework), DMARC, or another Email Hosting product? These 2.8K Heinlein Support (mailbox.org) users are your displacement audience, filterable by country and company size.
Market research
Heinlein Support (mailbox.org) adoption concentrates in Germany (95.8%), United States (1.2%), and Austria (1%). Size the Email Hosting market by geography before you build or invest.
Free for non-profits, academia & data journalists - non-commercial and public-interest use, on request.
Request accessTurn 2,838 Heinlein Support (mailbox.org) websites into your next campaign, audit, or dataset
Unlock Heinlein Support (mailbox.org) and download unlimited filtered reports for a month: up to 1M sites per list, segmented by country, TLD, or stack, with up to 20 data points per site.
No contracts, cancel anytime · Instant access after checkout · Data point availability varies by website and report