Flexmail email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 17, 2026), Flexmail is the email service provider (ESP) for 232 domains — 0.04% of 635,547 SPF-publishing domains. Its strongest TLD is .be (56.0% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-17 DNS snapshot.
What Flexmail represents in this dataset
Flexmail — Belgian email marketing.
Directory category: Esp. 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 2026-09-17 snapshot shows about Flexmail
Across 18 distinct TLDs its top three are .be (56.0%), .com (16.8%), .nl (9.1%) — together 81.9% of the 232 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 Microsoft 365 (Mailbox, 142 domains, 61.2% of them), followed by Unknown / Other (7.3%). 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 (2026-09-17); 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 Flexmail
What else the same 232 domains use — cross-tabulated from the same daily snapshot (2026-09-17).
| Type | Service | Domains | Share of Flexmail users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 142 | 61.2% |
| Mailbox | Unknown / Other | 17 | 7.3% |
| Mailbox | Google Workspace | 12 | 5.2% |
| Mailbox | Self-Hosted | 11 | 4.7% |
| Mailbox | Proofpoint | 7 | 3.0% |
| Mailbox | Symantec MessageLabs | 6 | 2.6% |
| ESP | Mandrill | 33 | 14.2% |
| ESP | Mailchimp | 30 | 12.9% |
| ESP | Mailjet (Sinch) | 26 | 11.2% |
| ESP | SendGrid (Twilio) | 19 | 8.2% |
TLD distribution (top 18 of 18)
Frequently asked questions
How many domains use Flexmail?
232 domains in the Tranco top-1M use Flexmail as their email service provider (ESP) as of September 17, 2026, according to Live Direct Marketing's daily DNS scan.
What is Flexmail's market share?
Flexmail holds 0.04% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-17). The number is recomputed every day.
What are the biggest alternatives to Flexmail?
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 2026-09-17).
Largest email service provider (ESP)s in this category
Amazon SES (6.20%) · SendGrid (Twilio) (4.64%) · Mailgun (4.01%) · Zendesk (3.77%) · Mailchimp (3.58%) · Mandrill (3.25%) · HubSpot (3.13%) · Salesforce (2.55%) · Mailjet (Sinch) (2.13%) · Cloudflare Email Routing (1.95%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 232 domains.