iCoreMail email service provider (ESP)
According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), iCoreMail is the email service provider (ESP) for 360 domains — 0.06% of 637,420 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 360 domains in the Tranco top-1M use iCoreMail (0.06% of SPF-publishing domains).
- Snapshot date: 2026-09-24 — recomputed every day.
- Strongest TLD: .cn (51.7% of its domains).
- Most co-used service: Unknown / Other.
- Directory category: email service provider.
Why iCoreMail appears in this category
iCoreMail — Indian email marketing platform.
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.
iCoreMail is an email service provider whose presence across the internet is detected primarily through SPF include mechanisms. The service is concentrated in the Chinese domain space (.cn) and predominantly serves smaller websites and regional organisations rather than major enterprises.
For anyone sending mail through or receiving from sites using iCoreMail, the provider's positioning in the long tail of the email ecosystem means it typically lacks the established reputation infrastructure of major ESPs. Its concentration in the .cn space and frequent co-occurrence with lesser-known providers means authentication and deliverability practices on iCoreMail-reliant domains may be less standardised, requiring heightened scrutiny of SPF records and sender reputation signals during assessment.
Where iCoreMail sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.3% |
| Top 10,000 | 5 | 1.4% |
| Top 100,000 | 78 | 21.7% |
| Top 1,000,000 | 276 | 76.7% |
| Unranked | 0 | 0.0% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .cn | 186 | 51.7% | |
| .com | 124 | 34.4% | |
| .com.cn | 29 | 8.1% | |
| .net | 8 | 2.2% | |
| .id | 3 | 0.8% | |
| .cc | 2 | 0.6% | |
| .edu | 1 | 0.3% | |
| .co | 1 | 0.3% | |
| .io | 1 | 0.3% | |
| .ai | 1 | 0.3% |
What iCoreMail users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 360 domains.
| Type | Service | Domains | Share of iCoreMail users |
|---|---|---|---|
| Mailbox | Unknown / Other | 150 | 41.7% |
| Mailbox | Self-Hosted | 108 | 30.0% |
| Mailbox | Generic / unmatched (mx*.*) | 88 | 24.4% |
| Mailbox | Generic / unmatched (mail.*) | 4 | 1.1% |
| Mailbox | Google Workspace | 2 | 0.6% |
| Mailbox | QQ Mail (Tencent) | 2 | 0.6% |
| ESP | Mandrill | 4 | 1.1% |
| ESP | Zendesk | 2 | 0.6% |
| ESP | Mailgun | 2 | 0.6% |
| ESP | HubSpot | 1 | 0.3% |
Reputation data coverage and sending visibility
iCoreMail's concentration in smaller sites and regional markets means that major reputation databases and blocklists may have limited historical data on its sending patterns and infrastructure. When assessing inboxing outcomes for sites using iCoreMail, mailbox providers' algorithms may treat the provider with caution due to sparse track record visibility, potentially affecting delivery to subscribers whose ISP relies on behavioural or third-party reputation signals rather than SPF and DKIM validation alone.
See the full iCoreMail data page (KPI cards, trend, sample domains) →
Run a free inbox-placement test across Gmail, Outlook, Yahoo and more — see exactly where your mail lands and why.
Frequently asked questions
Why does iCoreMail appear in SPF records?
iCoreMail is an email service provider; when it appears in an SPF record via an include mechanism, it means that domain has authorised iCoreMail to send mail on its behalf. This is particularly common among smaller sites and organisations in the Chinese domain space.
How many domains use iCoreMail?
360 domains in the Tranco top-1M use iCoreMail as their email service provider (ESP) as of September 24, 2026 (0.06% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is iCoreMail common enough to affect email deliverability testing?
iCoreMail accounts for 0.06% 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 iCoreMail most?
iCoreMail's largest TLD is .cn (51.7% of its domains); it appears across 14 TLDs in total.