According to Live Direct Marketing's daily Tranco top-1M scan (July 12, 2026), 263 Mail (CN) is the mailbox provider for 127 domains — 0.02% of 658,108 domains with MX records. Detection method: primary MX record (lowest preference).
263 Mail (CN) is a mailbox provider, identified by its presence as the primary MX record across a portion of the Tranco top-1M. It appears concentrated in the .com namespace and serves a distribution that is geographically global with a US skew.
Its presence in the long tail—dominated by smaller and mid-market properties rather than major brands—means that mail destined for 263-hosted accounts comprises a smaller share of campaign volume, but a diverse and non-consolidated addressee base. The service frequently coexists with Mailgun in the same domain's DNS records, indicating a split architecture where 263 handles inbound mail whilst Mailgun manages outbound delivery.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 6 | 4.7% |
| Top 1,000,000 | 84 | 66.1% |
| Unranked | 37 | 29.1% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 76 | 59.8% | |
| .cn | 27 | 21.3% | |
| .com.cn | 12 | 9.4% | |
| .net | 7 | 5.5% | |
| .org | 2 | 1.6% | |
| .store | 1 | 0.8% | |
| .ai | 1 | 0.8% | |
| .cc | 1 | 0.8% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 127 domains.
| Type | Service | Domains | Share of 263 Mail (CN) users |
|---|---|---|---|
| ESP | Mailgun | 3 | 2.4% |
| ESP | MailerSend | 2 | 1.6% |
| ESP | SendCloud (China) | 2 | 1.6% |
| ESP | Zendesk | 2 | 1.6% |
| ESP | Klaviyo | 1 | 0.8% |
| ESP | SendGrid (Twilio) | 1 | 0.8% |
| ESP | AWeber | 1 | 0.8% |
| ESP | Elastic Email | 1 | 0.8% |
263 Mail and Mailgun often appear together in a domain's MX and DNS records—a pattern that signals a split-role architecture. 263 handles inbound mail reception and storage, whilst Mailgun manages transactional or outbound delivery. For senders, this separation means reputation and filtering decisions are made by distinct services, and reputation damage to one (such as a Mailgun listing issue) does not automatically carry over to the other.
See the full 263 Mail (CN) data page (KPI cards, trend, sample domains) →
263 Mail is a mailbox provider used by smaller and mid-market websites globally; it is less critical for enterprise-focused campaigns, but worth testing against if your addressee base includes regional or smaller-site recipients.
127 domains in the Tranco top-1M use 263 Mail (CN) as their mailbox provider as of July 12, 2026 (0.02% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
263 Mail (CN) accounts for 0.02% 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.
263 Mail (CN)'s largest TLD is .com (59.8% of its domains); it appears across 8 TLDs in total.