Synergy! Marketing email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 17, 2026), Synergy! Marketing is the email service provider (ESP) for 138 domains — 0.02% of 635,547 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 138 domains in the Tranco top-1M use Synergy! Marketing (0.02% of SPF-publishing domains).
- Snapshot date: 2026-09-17 — recomputed every day.
- Strongest TLD: .co.jp (58.0% of its domains).
- Most co-used service: Microsoft 365.
- Directory category: email service provider.
Why Synergy! Marketing appears in this category
Synergy! Marketing — Japanese marketing cloud.
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.
Synergy! Marketing is a Japanese email service provider offering bulk email and marketing automation capabilities. Its infrastructure footprint is visible through SPF include mechanisms in email authentication records across the Tranco top-1 million website index.
The presence of Synergy! Marketing's SPF includes indicates a specific adoption pattern: it serves smaller and mid-market organisations rather than enterprise or household-name brands, with pronounced concentration in the .co.jp domain space. For senders and receiving operators, this footprint means Synergy! Marketing's sender reputation and configuration practices carry weight primarily in regional and vertical-segment receiving contexts; its co-appearance alongside Microsoft 365 authentication suggests hybrid mail-stack deployments common among its customer base.
Where Synergy! Marketing sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.7% |
| Top 10,000 | 2 | 1.4% |
| Top 100,000 | 21 | 15.2% |
| Top 1,000,000 | 114 | 82.6% |
| Unranked | 0 | 0.0% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .co.jp | 80 | 58.0% | |
| .com | 27 | 19.6% | |
| .jp | 20 | 14.5% | |
| .or.jp | 6 | 4.3% | |
| .ne.jp | 2 | 1.4% | |
| .ac.jp | 1 | 0.7% | |
| .org | 1 | 0.7% | |
| .info | 1 | 0.7% |
What Synergy! Marketing users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 138 domains.
| Type | Service | Domains | Share of Synergy! Marketing users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 58 | 42.0% |
| Mailbox | Google Workspace | 24 | 17.4% |
| Mailbox | SecureMX (JP) | 16 | 11.6% |
| Mailbox | Unknown / Other | 14 | 10.1% |
| Mailbox | Self-Hosted | 11 | 8.0% |
| Mailbox | Trend Micro | 3 | 2.2% |
| ESP | Salesforce | 33 | 23.9% |
| ESP | Amazon SES | 28 | 20.3% |
| ESP | Repica WebCAS | 20 | 14.5% |
| ESP | HDEMS | 18 | 13.0% |
SPF include validation and misconfiguration in Synergy! Marketing's ecosystem
When an organisation publishes an SPF include for Synergy! Marketing, it delegates outbound authorisation to Synergy!'s published IP ranges. Sysadmins and deliverability engineers should verify that Synergy! Marketing's own SPF and DKIM records remain stable and that the include does not inadvertently broaden the authorised sender set—a configuration risk in multi-vendor mail stacks where SPF records accumulate multiple includes over time.
See the full Synergy! Marketing data page (KPI cards, trend, sample domains) →
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Frequently asked questions
Should I test email deliverability specifically against Synergy! Marketing?
Test against it if your recipients are concentrated in Japan or if your organisation shares infrastructure with Synergy! Marketing customers; otherwise it falls outside the critical delivery path for generic ESP deliverability validation.
How many domains use Synergy! Marketing?
138 domains in the Tranco top-1M use Synergy! Marketing as their email service provider (ESP) as of September 17, 2026 (0.02% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Synergy! Marketing common enough to affect email deliverability testing?
Synergy! Marketing 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 Synergy! Marketing most?
Synergy! Marketing's largest TLD is .co.jp (58.0% of its domains); it appears across 8 TLDs in total.