rexx systems email provider statistics and deliverability context
← Email Stats homesaas
According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), rexx systems is the SaaS sender for 237 domains — 0.04% of 637,420 SPF-publishing domains. Its strongest TLD is .de (57.0% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-24 DNS snapshot.
What rexx systems represents in this dataset
rexx systems — German HR cloud.
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 2026-09-24 snapshot shows about rexx systems
Across 13 distinct TLDs its top three are .de (57.0%), .com (28.7%), .at (4.6%) — together 90.3% of the 237 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, 94 domains, 39.7% of them), followed by Self-Hosted (19.4%). Directly comparable by the same detection rule: Shopify, Pardot (Salesforce), CodeTwo Email Signatures 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 (2026-09-24); 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 rexx systems
What else the same 237 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of rexx systems users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 94 | 39.7% |
| Mailbox | Self-Hosted | 46 | 19.4% |
| Mailbox | Unknown / Other | 33 | 13.9% |
| Mailbox | Hornetsecurity | 14 | 5.9% |
| Mailbox | Generic / unmatched (mx*.*) | 11 | 4.6% |
| Mailbox | Proofpoint | 9 | 3.8% |
TLD distribution (top 13 of 13)
Frequently asked questions
How many domains use rexx systems?
237 domains in the Tranco top-1M use rexx systems as their SaaS sender as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is rexx systems's market share?
rexx systems holds 0.04% 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 rexx systems?
The largest SaaS senders in the same category by Tranco top-1M share are: Shopify, Pardot (Salesforce), CodeTwo Email Signatures 365, KnowBe4, Statuspage (Atlassian) (as of 2026-09-24).
Largest SaaS senders in this category
Shopify (0.84%) · Pardot (Salesforce) (0.75%) · CodeTwo Email Signatures 365 (0.71%) · KnowBe4 (0.54%) · Statuspage (Atlassian) (0.33%) · Trustpilot (0.30%) · Firebase (Google) (0.29%) · Atlassian (Jira/Confluence) (0.28%) · BigCommerce (0.27%) · Lark / Feishu (0.20%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 237 domains.