Contactlab email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), Contactlab is the email service provider (ESP) for 117 domains — 0.02% of 637,420 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 117 domains in the Tranco top-1M use Contactlab (0.02% of SPF-publishing domains).
- Snapshot date: 2026-09-24 — recomputed every day.
- Strongest TLD: .it (51.3% of its domains).
- Most co-used service: Microsoft 365.
- Directory category: email service provider.
Why Contactlab appears in this category
Contactlab — Italian customer engagement platform.
We classify it as a email service provider 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.
Contactlab is an email service provider that manages marketing campaigns and customer communications for organisations across Europe, with a particular presence among Italian businesses and European mid-market brands. The platform acts as a sending infrastructure provider, enabling clients to maintain dedicated email channels for marketing and transactional mail.
Contactlab's visibility in SPF records reveals a concentrated footprint among smaller and regional brands rather than global enterprise leaders. Most notably, the service appears predominantly in Italian domains and frequently coexists with Microsoft 365 in the same organisation's SPF configuration. For mail administrators, this pattern signals hybrid sending infrastructure: organisations running Office 365 for conventional business mail whilst routing marketing, campaigns, or segmented communications through a separate platform such as Contactlab.
Where Contactlab sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.9% |
| Top 10,000 | 3 | 2.6% |
| Top 100,000 | 31 | 26.5% |
| Top 1,000,000 | 81 | 69.2% |
| Unranked | 1 | 0.9% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .it | 60 | 51.3% | |
| .com | 44 | 37.6% | |
| .es | 3 | 2.6% | |
| .pt | 2 | 1.7% | |
| .com.ar | 1 | 0.9% | |
| .at | 1 | 0.9% | |
| .de | 1 | 0.9% | |
| .nl | 1 | 0.9% | |
| .co.uk | 1 | 0.9% | |
| .co.za | 1 | 0.9% |
What Contactlab users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 117 domains.
| Type | Service | Domains | Share of Contactlab users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 48 | 41.0% |
| Mailbox | Unknown / Other | 16 | 13.7% |
| Mailbox | Proofpoint | 15 | 12.8% |
| Mailbox | Google Workspace | 12 | 10.3% |
| Mailbox | Self-Hosted | 8 | 6.8% |
| Mailbox | Cisco IronPort | 6 | 5.1% |
| ESP | Zendesk | 23 | 19.7% |
| ESP | Proofpoint | 17 | 14.5% |
| ESP | MailUp | 16 | 13.7% |
| ESP | Salesforce | 13 | 11.1% |
SPF footprint and hybrid infrastructure patterns
Contactlab's presence in SPF records correlates with a specific infrastructure pattern common in European mid-market organisations: the combination of a primary mail provider (typically Microsoft 365) with a secondary campaign or marketing platform. This dual-provider setup affects sender reputation management, as traffic from Contactlab's sending infrastructure operates independently of an organisation's primary email service. Mail administrators must monitor both the primary provider's IP reputation and Contactlab's dedicated sending IPs to understand email performance holistically, particularly when campaigns and transactional mail route through different platforms.
See the full Contactlab data page (KPI cards, trend, sample domains) →
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Frequently asked questions
What does Contactlab in an SPF record indicate about an organisation?
Contactlab's presence signals that the organisation uses a dedicated marketing or campaign email platform, typically in addition to a primary email service such as Microsoft 365. This arrangement is common in European businesses that separate campaign sending from transactional or business mail.
How many domains use Contactlab?
117 domains in the Tranco top-1M use Contactlab as their email service provider (ESP) as of September 24, 2026 (0.02% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Contactlab common enough to affect email deliverability testing?
Contactlab 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 Contactlab most?
Contactlab's largest TLD is .it (51.3% of its domains); it appears across 12 TLDs in total.