DNSExit email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 20, 2026), DNSExit is the email service provider (ESP) for 112 domains — 0.02% of 638,158 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 112 domains in the Tranco top-1M use DNSExit (0.02% of SPF-publishing domains).
- Snapshot date: 2026-09-20 — recomputed every day.
- Strongest TLD: .com (56.2% of its domains).
- Most co-used service: Microsoft 365.
- Directory category: email forwarding service.
Why DNSExit appears in this category
DNSExit — DNS + email forwarding service.
We classify it as a email forwarding service from include: mechanisms in the SPF record matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
DNSExit is an email service provider (ESP) that handles message transmission and authentication for smaller to mid-sized organisations, particularly those operating .com domains. Its presence is most readily identified through SPF configuration records, where it appears as an include mechanism across the broader DNS ecosystem.
Because DNSExit occupies the long tail of the market rather than a dominant position among major brands, and is frequently deployed alongside Microsoft 365, its role in email infrastructure is less visible to bulk senders but remains relevant to any deliverability professional assessing real-world authentication patterns or testing against representative configurations.
Where DNSExit sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 1 | 0.9% |
| Top 100,000 | 5 | 4.5% |
| Top 1,000,000 | 106 | 94.6% |
| Unranked | 0 | 0.0% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 63 | 56.2% | |
| .vn | 10 | 8.9% | |
| .org | 7 | 6.2% | |
| .net | 7 | 6.2% | |
| .fr | 2 | 1.8% | |
| .com.au | 2 | 1.8% | |
| .com.vn | 1 | 0.9% | |
| .ca | 1 | 0.9% | |
| .se | 1 | 0.9% | |
| .be | 1 | 0.9% |
What DNSExit users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 112 domains.
| Type | Service | Domains | Share of DNSExit users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 25 | 22.3% |
| Mailbox | Google Workspace | 20 | 17.9% |
| Mailbox | Self-Hosted | 18 | 16.1% |
| Mailbox | Unknown / Other | 14 | 12.5% |
| Mailbox | Mimecast | 4 | 3.6% |
| Mailbox | Generic / unmatched (mx*.*) | 4 | 3.6% |
| ESP | Mailgun | 9 | 8.0% |
| ESP | SendGrid (Twilio) | 8 | 7.1% |
| ESP | Zendesk | 7 | 6.2% |
| ESP | Amazon SES | 7 | 6.2% |
Coexistence with Microsoft 365 in hybrid email architectures
DNSExit's primary footprint emerges in organisations that have adopted Microsoft 365 for primary email services but retain supplementary outbound sending through an additional ESP. This pattern is common in the long-tail segment where organisations either migrate gradually from legacy providers or maintain parallel sending paths for specific workloads (marketing automation, transactional mail, platform notifications). For SPF auditors and email infrastructure teams, this co-presence means that organisations using Microsoft 365 alone should not be expected to publish DNSExit SPF includes—their presence indicates a second sending service.
See the full DNSExit data page (KPI cards, trend, sample domains) →
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Frequently asked questions
What is DNSExit, and should I monitor it for email deliverability?
DNSExit is a smaller-market ESP often used alongside Microsoft 365 for supplementary email sending. Unless you operate one of its sending servers or your organisation uses it for transactional or marketing mail, it is unlikely to directly affect your own deliverability; however, it is one of many smaller providers worth recognising in DNS records when auditing third-party email configurations.
How many domains use DNSExit?
112 domains in the Tranco top-1M use DNSExit as their email service provider (ESP) as of September 20, 2026 (0.02% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is DNSExit common enough to affect email deliverability testing?
DNSExit accounts for 0.02% of SPF-publishing domains 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 DNSExit most?
DNSExit's largest TLD is .com (56.2% of its domains); it appears across 27 TLDs in total.