MailHostBox mailbox provider
According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), MailHostBox is the mailbox provider for 587 domains — 0.09% of 675,489 domains with MX records. Detection method: primary MX record (lowest preference).
Key facts
- 587 domains in the Tranco top-1M use MailHostBox (0.09% of domains with MX records).
- Snapshot date: 2026-09-24 — recomputed every day.
- Strongest TLD: .com (49.9% of its domains).
- Region skew: Global / US-skewed.
- Most co-used service: MailHostBox.
- Directory category: mailbox provider.
Why MailHostBox appears in this category
Directi/Endurance-derived white-label mail platform.
We classify it as a mailbox provider from primary MX record (lowest preference) matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
MailHostBox is a mailbox provider whose infrastructure appears as a primary MX record across sites in the Tranco top-1M domain list. It functions as an external mail-handling service for websites requiring dedicated email hosting, positioning itself alongside other third-party mailbox platforms with a distinct deployment footprint across the web.
MailHostBox's presence concentrates in the .com namespace and skews toward smaller and mid-sized websites rather than the largest consumer or enterprise brands, with a global distribution weighted toward North America. For senders, this means a material fraction of legitimate business email routes through MailHostBox; for receivers and deliverability teams, understanding its filtering behaviour and acceptance policies is primarily relevant when targeting the small-to-medium-business segment rather than mass-market distribution.
Where MailHostBox sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.2% |
| Top 10,000 | 2 | 0.3% |
| Top 100,000 | 44 | 7.5% |
| Top 1,000,000 | 535 | 91.1% |
| Unranked | 5 | 0.9% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 293 | 49.9% | |
| .in | 100 | 17.0% | |
| .net | 59 | 10.1% | |
| .org | 25 | 4.3% | |
| .co.in | 22 | 3.7% | |
| .co | 12 | 2.0% | |
| .mn | 8 | 1.4% | |
| .info | 6 | 1.0% | |
| .biz | 3 | 0.5% | |
| .me | 3 | 0.5% |
What MailHostBox users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 587 domains.
| Type | Service | Domains | Share of MailHostBox users |
|---|---|---|---|
| ESP | MailHostBox | 482 | 82.1% |
| ESP | LogicBoxes OrderBox | 9 | 1.5% |
| ESP | Elastic Email | 8 | 1.4% |
| ESP | Endurance/Newfold Cloudfilter | 8 | 1.4% |
| ESP | Customer.io | 4 | 0.7% |
| ESP | ZeptoMail (Zoho) | 3 | 0.5% |
| ESP | SMTP2GO | 3 | 0.5% |
| ESP | Salesforce | 2 | 0.3% |
| ESP | SMTP.com | 2 | 0.3% |
| ESP | Amazon SES | 2 | 0.3% |
Testing coverage and the long-tail distribution
Because MailHostBox predominates among smaller and mid-sized sites rather than the largest-volume providers, it does not typically rank in condensed testing matrices that focus on major players. However, senders targeting small-business, regional, or long-tail .com audiences may find MailHostBox placement a more accurate signal of genuine delivery friction than testing against only tier-one providers; consumer-facing or enterprise-only campaigns can often deprioritise it without materially affecting outcome metrics, since its segment represents a smaller share of typical inbox populations.
See the full MailHostBox data page (KPI cards, trend, sample domains) →
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Frequently asked questions
Should I test email campaigns against MailHostBox?
Testing MailHostBox is valuable if your audience spans small businesses or the long-tail .com segment; for consumer-focused or enterprise-only mail, volume leaders typically represent more significant delivery risk.
How many domains use MailHostBox?
587 domains in the Tranco top-1M use MailHostBox as their mailbox provider as of September 24, 2026 (0.09% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Is MailHostBox common enough to affect email deliverability testing?
MailHostBox accounts for 0.09% of domains with MX records in the top 1M. Whether you should seed a test mailbox there depends on how much of your audience it represents — the co-usage table above shows the services it appears alongside most.
Which countries or TLDs use MailHostBox most?
MailHostBox's largest TLD is .com (49.9% of its domains); it appears across 52 TLDs in total.