According to Live Direct Marketing's daily Tranco top-1M scan (July 12, 2026), Adestra MessageProvider is the email service provider (ESP) for 217 domains — 0.04% of 617,244 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Adestra MessageProvider is an email transmission service that operates as a sending infrastructure component for organisations integrated with its platform. It is detected across the Tranco top-1M website list primarily through SPF include mechanisms, which broadcast its role in the authentication chain for outbound mail.
The observed footprint — concentrated in the .com space and prevalent amongst smaller and mid-market organisations, often running alongside Microsoft 365 — indicates that senders are most likely to encounter Adestra when integrating email services with hybrid M365 deployments. For mail receivers, the consistent appearance of Adestra in SPF records signals a recognisable, middleware-tier infrastructure component rather than direct corporate sending.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 2 | 0.9% |
| Top 100,000 | 23 | 10.6% |
| Top 1,000,000 | 185 | 85.3% |
| Unranked | 7 | 3.2% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 168 | 77.4% | |
| .org | 23 | 10.6% | |
| .bank | 6 | 2.8% | |
| .net | 5 | 2.3% | |
| .de | 2 | 0.9% | |
| .com.au | 2 | 0.9% | |
| .co.uk | 1 | 0.5% | |
| .co | 1 | 0.5% | |
| .ca | 1 | 0.5% | |
| .fr | 1 | 0.5% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 217 domains.
| Type | Service | Domains | Share of Adestra MessageProvider users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 73 | 33.6% |
| Mailbox | Proofpoint | 44 | 20.3% |
| Mailbox | Mimecast | 37 | 17.1% |
| Mailbox | Self-Hosted | 19 | 8.8% |
| Mailbox | Unknown / Other | 14 | 6.5% |
| Mailbox | Cisco IronPort | 9 | 4.1% |
| ESP | Salesforce | 38 | 17.5% |
| ESP | Mimecast | 37 | 17.1% |
| ESP | SendGrid (Twilio) | 29 | 13.4% |
| ESP | Mailgun | 21 | 9.7% |
When Adestra MessageProvider appears in an organisation's SPF record, it establishes a declared sending source that ISPs and mail filters use to validate sender identity. The co-location with Microsoft 365 deployments suggests that many Adestra users are leveraging it as an augmentation to native Exchange sending — a pattern common in organisations needing specialist email delivery capabilities beyond their M365 tenant's native SMTP. Ensuring strict SPF alignment (the sending domain's domain matches the SPF-authorised sender domain or subdomain) becomes critical in these hybrid scenarios to prevent authentication failures and deliverability degradation.
See the full Adestra MessageProvider data page (KPI cards, trend, sample domains) →
Adestra MessageProvider is an email transmission service found in SPF records across mid-market and smaller organisations, particularly those running Microsoft 365. Testing against it is not typically necessary unless your mail is specifically targeted at organisations known to use Adestra, but understanding its role in authentication chains is useful when diagnosing delivery issues involving SPF or hybrid-M365 setups.
217 domains in the Tranco top-1M use Adestra MessageProvider as their email service provider (ESP) as of July 12, 2026 (0.04% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Adestra MessageProvider accounts for 0.04% 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.
Adestra MessageProvider's largest TLD is .com (77.4% of its domains); it appears across 17 TLDs in total.