MailGuard email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), MailGuard is the email service provider (ESP) for 91 domains — 0.01% of 637,420 SPF-publishing domains. Its strongest TLD is .com.au (53.8% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-24 DNS snapshot.
What MailGuard represents in this dataset
MailGuard — Australian email security gateway.
Directory category: Gateway. The classification comes from include: mechanisms in the SPF record. It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-24 snapshot shows about MailGuard
Across 11 distinct TLDs its top three are .com.au (53.8%), .com (18.7%), .au (14.3%) — together 86.8% of the 91 domains, which makes the footprint narrow — three TLDs cover most of it, which is typical of a regional or single-market operator. The service most often observed on the same domains is Unknown / Other (Mailbox, 62 domains, 68.1% of them), followed by Microsoft 365 (23.1%). Directly comparable by the same detection rule: Amazon SES, SendGrid (Twilio), Mailgun. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-24); a domain appears here when its published records match the include: mechanisms in the SPF record rule, which is an infrastructure fact, not a commercial relationship.
Commonly used together with MailGuard
What else the same 91 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of MailGuard users |
|---|---|---|---|
| Mailbox | Unknown / Other | 62 | 68.1% |
| Mailbox | Microsoft 365 | 21 | 23.1% |
| Mailbox | Google Workspace | 3 | 3.3% |
| Mailbox | Sophos Email | 1 | 1.1% |
| Mailbox | Trend Micro | 1 | 1.1% |
| Mailbox | Proofpoint | 1 | 1.1% |
| ESP | Mailchimp | 17 | 18.7% |
| ESP | Amazon SES | 16 | 17.6% |
| ESP | Zendesk | 11 | 12.1% |
| ESP | SendGrid (Twilio) | 8 | 8.8% |
TLD distribution (top 11 of 11)
Frequently asked questions
How many domains use MailGuard?
91 domains in the Tranco top-1M use MailGuard as their email service provider (ESP) as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is MailGuard's market share?
MailGuard holds 0.01% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-24). The number is recomputed every day.
What are the biggest alternatives to MailGuard?
The largest email service provider (ESP)s in the same category by Tranco top-1M share are: Amazon SES, SendGrid (Twilio), Mailgun, Zendesk, Mailchimp (as of 2026-09-24).
Largest email service provider (ESP)s in this category
Amazon SES (6.23%) · SendGrid (Twilio) (4.68%) · Mailgun (4.01%) · Zendesk (3.77%) · Mailchimp (3.61%) · Mandrill (3.26%) · HubSpot (3.18%) · Salesforce (2.57%) · Mailjet (Sinch) (2.14%) · Cloudflare Email Routing (1.96%)
Domain sample (top 91 by Tranco rank)
Showing 91 of 91 domains.