According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Emsd1 (transactional) is the email service provider (ESP) for 2,962 domains — 0.48% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Emsd1 (transactional) is an email service provider specialising in transactional messages — such as password resets, account confirmations, and operational notifications. It operates as a backend mail relay and is identified in email authentication records through its SPF include mechanism.
Emsd1's adoption is concentrated among smaller and mid-market .com websites and frequently appears alongside Google Workspace, reflecting a common pattern where transactional mail is routed through a dedicated provider separate from general business email. This separation affects both senders, who must properly configure Emsd1 in their SPF records, and receivers, who recognise this configuration as a deliberate architecture choice.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 18 | 0.6% |
| Top 100,000 | 379 | 12.8% |
| Top 1,000,000 | 2,346 | 79.2% |
| Unranked | 219 | 7.4% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 1,701 | 57.4% | |
| .org | 193 | 6.5% | |
| .nl | 154 | 5.2% | |
| .com.br | 150 | 5.1% | |
| .com.au | 63 | 2.1% | |
| .de | 59 | 2.0% | |
| .io | 57 | 1.9% | |
| .net | 49 | 1.7% | |
| .dk | 46 | 1.6% | |
| .it | 36 | 1.2% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 2,962 domains.
| Type | Service | Domains | Share of Emsd1 (transactional) users |
|---|---|---|---|
| Mailbox | Google Workspace | 1,410 | 47.6% |
| Mailbox | Microsoft 365 | 892 | 30.1% |
| Mailbox | Self-Hosted | 146 | 4.9% |
| Mailbox | Unknown / Other | 117 | 4.0% |
| Mailbox | Mimecast | 68 | 2.3% |
| Mailbox | Barracuda | 34 | 1.1% |
| ESP | Amazon SES | 484 | 16.3% |
| ESP | SendGrid (Twilio) | 438 | 14.8% |
| ESP | Zendesk | 369 | 12.5% |
| ESP | Mailchimp | 352 | 11.9% |
When organisations route transactional mail through Emsd1, they must include Emsd1's SPF mechanism in their authorised sender policy, enabling receiving servers to verify message legitimacy. This separation of transactional routing from general domain mail is a deliverability best practice, isolating the reputation and bounce handling of account-related messages from marketing communications.
See the full Emsd1 (transactional) data page (KPI cards, trend, sample domains) →
Emsd1 is a transactional email provider that handles account-related messages like password resets and confirmations. It appears in SPF records because organisations must explicitly authorise Emsd1's servers as legitimate senders in their domain's authentication policies.
2,962 domains in the Tranco top-1M use Emsd1 (transactional) as their email service provider (ESP) as of July 13, 2026 (0.48% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Emsd1 (transactional) accounts for 0.48% of SPF-publishing domains 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.
Emsd1 (transactional) is declining — its share moved -0.01 pp over the last 30 days (as of July 13, 2026).
Emsd1 (transactional)'s largest TLD is .com (57.4% of its domains); it appears across 121 TLDs in total.