According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Adestra (MessageFocus) is the email service provider (ESP) for 421 domains — 0.07% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Adestra, trading as MessageFocus, is an email service provider offering campaign and transactional email delivery to organisations seeking hosted email infrastructure. The service is operated by Adestra Ltd. and provides SMTP relay and API endpoints for sending, with SPF and DKIM signing handled transparently by the provider.
Adestra appears in the SPF records of a substantial segment of smaller websites and mid-market businesses, particularly across the .com namespace, often configured alongside Microsoft 365 as part of a hybrid email stack. This footprint pattern reflects a provider positioned for mid-market and departmental use rather than enterprise-scale deployments; organisations receiving email from Adestra-authenticated senders should expect a mixture of marketing campaigns, transactional notifications, and operational sends.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 2 | 0.5% |
| Top 10,000 | 9 | 2.1% |
| Top 100,000 | 64 | 15.2% |
| Top 1,000,000 | 319 | 75.8% |
| Unranked | 27 | 6.4% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 242 | 57.5% | |
| .co.uk | 81 | 19.2% | |
| .org | 50 | 11.9% | |
| .net | 12 | 2.9% | |
| .org.uk | 12 | 2.9% | |
| .com.au | 3 | 0.7% | |
| .ac.uk | 3 | 0.7% | |
| .edu | 2 | 0.5% | |
| .gov.uk | 2 | 0.5% | |
| .tv | 1 | 0.2% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 421 domains.
| Type | Service | Domains | Share of Adestra (MessageFocus) users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 168 | 39.9% |
| Mailbox | Mimecast | 76 | 18.1% |
| Mailbox | Google Workspace | 65 | 15.4% |
| Mailbox | Unknown / Other | 14 | 3.3% |
| Mailbox | Proofpoint | 13 | 3.1% |
| Mailbox | Barracuda | 13 | 3.1% |
| ESP | Mimecast | 81 | 19.2% |
| ESP | Mandrill | 61 | 14.5% |
| ESP | SendGrid (Twilio) | 60 | 14.3% |
| ESP | Amazon SES | 51 | 12.1% |
When organisations use both Microsoft 365 and Adestra for email delivery, SPF records must include both providers' sending ranges. Adestra SPF includes should be placed in sequence with Microsoft's include directives; the order does not affect validation, but all includes must fit within the typical 10-DNS-lookup limit. Organisations should audit their SPF record with a DNS checker to verify both include mechanisms resolve correctly and generate no syntax errors.
See the full Adestra (MessageFocus) data page (KPI cards, trend, sample domains) →
Adestra, as a shared sending platform, maintains its own sender reputation; your deliverability when sending through Adestra depends on your email practices (list hygiene, content, frequency) and Adestra's platform-wide reputation with mailbox providers. Organisations should monitor feedback loops and bounce reports from Adestra to identify and fix any sending issues.
421 domains in the Tranco top-1M use Adestra (MessageFocus) as their email service provider (ESP) as of July 13, 2026 (0.07% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Adestra (MessageFocus) accounts for 0.07% 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 (MessageFocus)'s largest TLD is .com (57.5% of its domains); it appears across 23 TLDs in total.