Topsec / TS-Mail (CN) mailbox provider
According to Live Direct Marketing's daily Tranco top-1M scan (September 11, 2026), Topsec / TS-Mail (CN) is the mailbox provider for 67 domains — 0.01% of 666,213 domains with MX records. Detection method: primary MX record (lowest preference).
Key facts
- 67 domains in the Tranco top-1M use Topsec / TS-Mail (CN) (0.01% of domains with MX records).
- Snapshot date: 2026-09-11 — recomputed every day.
- Strongest TLD: .ie (64.2% of its domains).
- Region skew: Ireland.
- Most co-used service: Amazon SES.
- Directory category: email security gateway.
Why Topsec / TS-Mail (CN) appears in this category
Chinese Topsec email security gateway.
We classify it as a email security gateway from primary MX record (lowest preference) matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
Topsec / TS-Mail (CN) is a mailbox infrastructure provider whose MX records appear predominantly across smaller and mid-market websites, with particular concentration in the Irish (.ie) domain namespace. As a Chinese-origin service, it functions as inbound mail routing infrastructure rather than as a branded consumer email platform, integrated into organisational domains via DNS MX records to receive incoming mail traffic.
The frequent co-occurrence of TS-Mail with Amazon SES across this site segment reflects an infrastructure pattern in which organisations route outbound mail through SES whilst receiving inbound mail through TS-Mail. For email practitioners, TS-Mail's filtering policies and reputation behaviour becomes operationally relevant primarily when targeting Irish small businesses or when analysing mixed-provider mail architectures; it remains a lower priority for global campaign delivery.
Where Topsec / TS-Mail (CN) sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 3 | 4.5% |
| Top 1,000,000 | 62 | 92.5% |
| Unranked | 2 | 3.0% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .ie | 43 | 64.2% | |
| .com | 20 | 29.9% | |
| .gov.uk | 3 | 4.5% | |
| .org.uk | 1 | 1.5% |
What Topsec / TS-Mail (CN) users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 67 domains.
| Type | Service | Domains | Share of Topsec / TS-Mail (CN) users |
|---|---|---|---|
| ESP | Amazon SES | 12 | 17.9% |
| ESP | Mailchimp | 6 | 9.0% |
| ESP | Mailgun | 6 | 9.0% |
| ESP | Salesforce | 5 | 7.5% |
| ESP | SendGrid (Twilio) | 5 | 7.5% |
| ESP | MailerLite | 4 | 6.0% |
| ESP | Mandrill | 4 | 6.0% |
| ESP | Mimecast | 3 | 4.5% |
| ESP | Campaign Monitor | 3 | 4.5% |
| ESP | Brevo (ex-Sendinblue) | 3 | 4.5% |
Inbound specialisation within mixed email infrastructure
TS-Mail's prevalence alongside Amazon SES indicates a distinct architectural choice in which organisations use SES for scalable outbound sending whilst delegating inbound receiving to TS-Mail, a separation less common in single-provider deployments. This split requires senders to assess reputation scoring and filtering policies as independent systems rather than assuming outbound and inbound providers share identical criteria. Practitioners assessing delivery success to TS-Mail-using domains should treat it as a separate deliverability vector, distinct from SES's reputation and policy framework.
See the full Topsec / TS-Mail (CN) data page (KPI cards, trend, sample domains) →
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Frequently asked questions
Do I need to test email deliverability against Topsec / TS-Mail?
Testing is worthwhile if your campaign targets Irish small businesses or if your recipient analysis reveals TS-Mail in your domain set; otherwise TS-Mail can remain deprioritised in favour of larger mail providers.
How many domains use Topsec / TS-Mail (CN)?
67 domains in the Tranco top-1M use Topsec / TS-Mail (CN) as their mailbox provider as of September 11, 2026 (0.01% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Is Topsec / TS-Mail (CN) common enough to affect email deliverability testing?
Topsec / TS-Mail (CN) accounts for 0.01% of domains with MX records 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 Topsec / TS-Mail (CN) most?
Topsec / TS-Mail (CN)'s largest TLD is .ie (64.2% of its domains); it appears across 4 TLDs in total.