According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Cisco IronPort is the mailbox provider for 2,619 domains — 0.40% of 658,711 domains with MX records. Detection method: primary MX record (lowest preference).
Cisco IronPort is a commercial email gateway and message filtering platform operated by Cisco. It provides organisations with email security, phishing and spam filtering, and message routing capabilities, typically deployed as an on-premises or cloud-hosted email gateway.
IronPort's footprint skews toward the long tail of mid-market and smaller organisations rather than the largest enterprise brands, with particular concentration in the .com domain space and a global-to-US regional weighting. The platform is frequently encountered alongside Salesforce deployments, though its overall market share has been declining in recent years. For email senders and infrastructure operators, this means IronPort is a secondary rather than primary reputation and testing priority, but remains relevant for campaigns targeting specific verticals and organisation sizes.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 13 | 0.5% |
| Top 10,000 | 71 | 2.7% |
| Top 100,000 | 437 | 16.7% |
| Top 1,000,000 | 1,973 | 75.3% |
| Unranked | 125 | 4.8% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 1,238 | 47.3% | |
| .org | 177 | 6.8% | |
| .edu | 86 | 3.3% | |
| .de | 82 | 3.1% | |
| .gov | 61 | 2.3% | |
| .fr | 58 | 2.2% | |
| .ca | 58 | 2.2% | |
| .net | 58 | 2.2% | |
| .co.il | 52 | 2.0% | |
| .it | 52 | 2.0% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 2,619 domains.
| Type | Service | Domains | Share of Cisco IronPort users |
|---|---|---|---|
| ESP | Salesforce | 240 | 9.2% |
| ESP | Amazon SES | 201 | 7.7% |
| ESP | SendGrid (Twilio) | 152 | 5.8% |
| ESP | Mandrill | 119 | 4.5% |
| ESP | Zendesk | 111 | 4.2% |
| ESP | Mailgun | 109 | 4.2% |
| ESP | HubSpot | 102 | 3.9% |
| ESP | Mailchimp | 96 | 3.7% |
| ESP | Mailjet (Sinch) | 74 | 2.8% |
| ESP | Marketo (Adobe) | 71 | 2.7% |
IronPort appears predominantly in Salesforce-integrated and mid-market organisations rather than tier-one properties. For senders targeting .com-based North American audiences within these segments, understanding IronPort's filtering behaviour and authentication stance can improve delivery; however, test more prevalent gateways first and include IronPort only if your audience profile specifically matches these deployment patterns.
See the full Cisco IronPort data page (KPI cards, trend, sample domains) →
Test against IronPort if your audience includes Salesforce-integrated organisations or mid-market .com companies. It is not a primary testing priority because it occupies the long tail rather than the largest brands.
2,619 domains in the Tranco top-1M use Cisco IronPort as their mailbox provider as of July 13, 2026 (0.40% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Cisco IronPort accounts for 0.40% 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.
Cisco IronPort is declining — its share moved -0.06 pp over the last 30 days (as of July 13, 2026).
Cisco IronPort's largest TLD is .com (47.3% of its domains); it appears across 132 TLDs in total.