mailbox
According to Live Direct Marketing's daily Tranco top-1M scan (July 26, 2026), Barracuda is the mailbox provider for 3,593 domains — 0.54% of 667,887 domains with MX records. Its share has been stable over the last 30 days. Its strongest TLD is .com (49.2% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-07-26 DNS snapshot.
Mid-market email security and backup.
Directory category: Gateway. The classification comes from primary MX record (lowest preference). It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
Across 117 distinct TLDs its top three are .com (49.2%), .org (16.6%), .edu (4.1%) — together 69.9% of the 3,593 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Barracuda Essentials (ESP, 1,809 domains, 50.3% of them), followed by Amazon SES (10.0%). Its share of domains with MX records has not moved measurably in 30 days. Directly comparable by the same detection rule: Self-Hosted, Google Workspace, Microsoft 365. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-07-26); a domain appears here when its published records match the primary MX record (lowest preference) rule, which is an infrastructure fact, not a commercial relationship.
What else the same 3,593 domains use — cross-tabulated from the same daily snapshot (2026-07-26).
| Type | Service | Domains | Share of Barracuda users |
|---|---|---|---|
| ESP | Barracuda Essentials | 1,809 | 50.3% |
| ESP | Amazon SES | 359 | 10.0% |
| ESP | SendGrid (Twilio) | 358 | 10.0% |
| ESP | Salesforce | 313 | 8.7% |
| ESP | Mailchimp | 309 | 8.6% |
| ESP | Barracuda Email Security | 296 | 8.2% |
| ESP | HubSpot | 285 | 7.9% |
| ESP | Mandrill | 265 | 7.4% |
| ESP | Mailgun | 233 | 6.5% |
| ESP | Zendesk | 177 | 4.9% |
3,593 domains in the Tranco top-1M use Barracuda as their mailbox provider as of July 26, 2026, according to Live Direct Marketing's daily DNS scan.
Barracuda holds 0.54% of domains with MX records in the Tranco top-1M (snapshot of 2026-07-26). The number is recomputed every day.
Barracuda's share has been stable over the last 30 days (±0.01 pp).
The largest mailbox providers in the same category by Tranco top-1M share are: Self-Hosted, Google Workspace, Microsoft 365, Unknown / Other, Generic / unmatched (mx*.*) (as of 2026-07-26).
Self-Hosted (22.75%) · Google Workspace (21.84%) · Microsoft 365 (16.92%) · Unknown / Other (6.80%) · Generic / unmatched (mx*.*) (2.54%) · Proofpoint (1.92%) · Generic / unmatched (mail.*) (1.77%) · Yandex 360 (1.68%) · Cloudflare Email Routing (1.63%) · Mimecast (1.53%)
Showing 100 of 3,593 domains.