Exclaimer (signatures) email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 11, 2026), Exclaimer (signatures) is the email service provider (ESP) for 2,646 domains — 0.42% of 631,089 SPF-publishing domains. Its share has been stable over the last 30 days. Its strongest TLD is .com (49.7% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-11 DNS snapshot.
What Exclaimer (signatures) represents in this dataset
UK-headquartered email-signature management (Insight Partners).
Directory category: Saas. 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 2026-09-11 snapshot shows about Exclaimer (signatures)
Across 112 distinct TLDs its top three are .com (49.7%), .nl (9.0%), .org (6.2%) — together 64.9% of the 2,646 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Microsoft 365 (Mailbox, 1,735 domains, 65.6% of them), followed by Mimecast (8.6%). Its share of SPF-publishing domains has not moved measurably in 30 days. 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 (2026-09-11); 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 Exclaimer (signatures)
What else the same 2,646 domains use — cross-tabulated from the same daily snapshot (2026-09-11).
| Type | Service | Domains | Share of Exclaimer (signatures) users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 1,735 | 65.6% |
| Mailbox | Mimecast | 228 | 8.6% |
| Mailbox | Google Workspace | 134 | 5.1% |
| Mailbox | Proofpoint | 102 | 3.9% |
| Mailbox | Unknown / Other | 100 | 3.8% |
| Mailbox | Barracuda | 94 | 3.6% |
| ESP | SendGrid (Twilio) | 423 | 16.0% |
| ESP | Salesforce | 370 | 14.0% |
| ESP | HubSpot | 345 | 13.0% |
| ESP | Amazon SES | 340 | 12.8% |
TLD distribution (top 30 of 112)
Frequently asked questions
How many domains use Exclaimer (signatures)?
2,646 domains in the Tranco top-1M use Exclaimer (signatures) as their email service provider (ESP) as of September 11, 2026, according to Live Direct Marketing's daily DNS scan.
What is Exclaimer (signatures)'s market share?
Exclaimer (signatures) holds 0.42% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-11). The number is recomputed every day.
Is Exclaimer (signatures) growing or declining?
Exclaimer (signatures)'s share has been stable over the last 30 days (±0.01 pp).
What are the biggest alternatives to Exclaimer (signatures)?
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 2026-09-11).
Largest email service provider (ESP)s in this category
Amazon SES (6.17%) · SendGrid (Twilio) (4.63%) · Mailgun (4.00%) · Zendesk (3.76%) · Mailchimp (3.56%) · Mandrill (3.24%) · HubSpot (3.10%) · Salesforce (2.54%) · Mailjet (Sinch) (2.12%) · Cloudflare Email Routing (1.93%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 2,646 domains.