According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), SynXis (Sabre) is the SaaS sender for 262 domains — 0.04% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
SynXis, a Sabre product, is a cloud-based email transmission platform that enables organisations to send mail on behalf of their domains. As a SaaS offering, it sits between an organisation's mail server infrastructure and external recipients, handling message delivery, compliance, and bounce processing.
SynXis appears predominantly in SPF records of smaller and mid-market organisations, particularly in the .com domain space, and is frequently configured alongside Microsoft 365. This pattern reflects its use case: organisations that have adopted Microsoft 365 but need an additional or alternative email transmission channel—often for transactional mail, bulk communications, or regulatory-specific workflows—layer SynXis over their existing Microsoft email infrastructure.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 27 | 10.3% |
| Top 1,000,000 | 216 | 82.4% |
| Unranked | 19 | 7.3% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 209 | 79.8% | |
| .co.jp | 10 | 3.8% | |
| .co.uk | 6 | 2.3% | |
| .nl | 5 | 1.9% | |
| .it | 4 | 1.5% | |
| .de | 3 | 1.1% | |
| .ch | 3 | 1.1% | |
| .co.za | 2 | 0.8% | |
| .fr | 2 | 0.8% | |
| .com.br | 2 | 0.8% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 262 domains.
| Type | Service | Domains | Share of SynXis (Sabre) users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 132 | 50.4% |
| Mailbox | Mimecast | 29 | 11.1% |
| Mailbox | Unknown / Other | 21 | 8.0% |
| Mailbox | Google Workspace | 17 | 6.5% |
| Mailbox | Proofpoint | 15 | 5.7% |
| Mailbox | Barracuda | 10 | 3.8% |
When an organisation runs both Microsoft 365 and SynXis, both services require authorisation in the domain's SPF record to prevent spoofing filters from rejecting legitimate mail. The SynXis SPF mechanism sits alongside Microsoft's SPF records, creating a multi-provider mail setup. Senders and infrastructure operators need to account for both when diagnosing delivery issues, as a rejected message could originate from either platform's infrastructure, and reputation signals are split between them rather than unified under a single mail service.
See the full SynXis (Sabre) data page (KPI cards, trend, sample domains) →
Organisations often use SynXis as a complementary email service when Microsoft 365 alone does not meet their needs—for example, to handle high-volume transactional mail, comply with specific regulatory pathways, or integrate legacy email workflows. Both services require SPF authorisation to send mail legitimately on the domain's behalf.
262 domains in the Tranco top-1M use SynXis (Sabre) as their SaaS sender as of July 13, 2026 (0.04% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
SynXis (Sabre) 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.
SynXis (Sabre)'s largest TLD is .com (79.8% of its domains); it appears across 24 TLDs in total.