EmailSecurity.app gateway mailbox provider
According to Live Direct Marketing's daily Tranco top-1M scan (September 14, 2026), EmailSecurity.app gateway is the mailbox provider for 251 domains — 0.04% of 674,487 domains with MX records. Detection method: primary MX record (lowest preference).
Key facts
- 251 domains in the Tranco top-1M use EmailSecurity.app gateway (0.04% of domains with MX records).
- Snapshot date: 2026-09-14 — recomputed every day.
- Strongest TLD: .com (44.2% of its domains).
- Region skew: Global / US-skewed.
- Most co-used service: LibraESVA.
- Directory category: email security gateway.
Why EmailSecurity.app gateway appears in this category
Niche email security gateway (multi-region MX).
We classify it as a email security gateway 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.
EmailSecurity.app gateway is a mail gateway and mailbox provider handling inbound email for domains where it appears as the primary MX record. It operates as a receiving infrastructure layer for email delivery across the publicly indexed web.
Across the most-visited sites globally, EmailSecurity.app gateway's footprint concentrates in the long tail of smaller to mid-sized organisations rather than the largest brands, distributed internationally across many top-level domains with particular density in .com and a Global/US skew. For senders, this pattern means managing delivery to a meaningful yet fragmented recipient base; for receivers, it entails experiencing its filtering and queueing behaviour when exchanging mail with those smaller organisations.
Where EmailSecurity.app gateway sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 17 | 6.8% |
| Top 1,000,000 | 231 | 92.0% |
| Unranked | 3 | 1.2% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 111 | 44.2% | |
| .co.uk | 30 | 12.0% | |
| .org | 29 | 11.6% | |
| .ro | 9 | 3.6% | |
| .org.uk | 8 | 3.2% | |
| .ie | 6 | 2.4% | |
| .gr | 6 | 2.4% | |
| .it | 5 | 2.0% | |
| .ca | 3 | 1.2% | |
| .net | 3 | 1.2% |
What EmailSecurity.app gateway users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 251 domains.
| Type | Service | Domains | Share of EmailSecurity.app gateway users |
|---|---|---|---|
| ESP | LibraESVA | 168 | 66.9% |
| ESP | Mailchimp | 23 | 9.2% |
| ESP | Mailgun | 23 | 9.2% |
| ESP | Amazon SES | 22 | 8.8% |
| ESP | SendGrid (Twilio) | 22 | 8.8% |
| ESP | Mandrill | 21 | 8.4% |
| ESP | HubSpot | 14 | 5.6% |
| ESP | Zendesk | 12 | 4.8% |
| ESP | Salesforce | 10 | 4.0% |
| ESP | Campaign Monitor | 8 | 3.2% |
Long-tail positioning and sender testing prioritisation
Because EmailSecurity.app gateway clusters among smaller and mid-sized sites rather than dominant global mailbox providers, senders rarely encounter standardised reputation guidance or publicly documented filter behaviour as they would for major ESPs. This long-tail placement justifies its inclusion in authentication and list-quality procedures where those recipients matter to the sender's business, but does not demand the same priority as testing against the largest providers when resources are constrained.
See the full EmailSecurity.app gateway data page (KPI cards, trend, sample domains) →
Run a free inbox-placement test across Gmail, Outlook, Yahoo and more — see exactly where your mail lands and why.
Frequently asked questions
Is EmailSecurity.app gateway important for my email deliverability testing?
It handles mail for a distributed set of smaller and mid-sized organisations globally, warranting inclusion in testing if those organisations represent a material part of your recipient base; however, prioritise testing against the largest consumer and business mailbox providers first.
How many domains use EmailSecurity.app gateway?
251 domains in the Tranco top-1M use EmailSecurity.app gateway as their mailbox provider as of September 14, 2026 (0.04% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Is EmailSecurity.app gateway common enough to affect email deliverability testing?
EmailSecurity.app gateway accounts for 0.04% 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 EmailSecurity.app gateway most?
EmailSecurity.app gateway's largest TLD is .com (44.2% of its domains); it appears across 43 TLDs in total.