ConnectWise SaaS sender
According to Live Direct Marketing's daily Tranco top-1M scan (September 12, 2026), ConnectWise is the SaaS sender for 416 domains — 0.07% of 629,828 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 416 domains in the Tranco top-1M use ConnectWise (0.07% of SPF-publishing domains).
- Snapshot date: 2026-09-12 — recomputed every day.
- 30-day share change: -0.00 pp.
- Strongest TLD: .com (64.2% of its domains).
- Most co-used service: Microsoft 365.
- Directory category: SaaS sender.
Why ConnectWise appears in this category
ConnectWise — US suite of PSA, RMM and remote-support tools for managed service providers.
We classify it as a SaaS sender from include: mechanisms in the SPF record matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
ConnectWise is a SaaS platform for sending email on behalf of customer domains. It is integrated into domains through an SPF include mechanism, which instructs receiving mail servers to accept messages from ConnectWise's infrastructure as authorised.
ConnectWise appears predominantly in DNS records of smaller organisations, concentrated in the .com registry space, and is frequently deployed in tandem with Microsoft 365. This pattern reflects a common architecture: smaller businesses using 365 for inbound mail and user mailboxes whilst routing outbound transactional or bulk mail through ConnectWise. For senders and receivers alike, the proper configuration and currency of the ConnectWise SPF include is essential to avoid authentication failures and spam filtering.
Where ConnectWise sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 3 | 0.7% |
| Top 100,000 | 23 | 5.5% |
| Top 1,000,000 | 388 | 93.3% |
| Unranked | 2 | 0.5% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 267 | 64.2% | |
| .org | 31 | 7.5% | |
| .net | 23 | 5.5% | |
| .com.au | 15 | 3.6% | |
| .ca | 14 | 3.4% | |
| .edu | 11 | 2.6% | |
| .co.uk | 9 | 2.2% | |
| .gov | 9 | 2.2% | |
| .nl | 6 | 1.4% | |
| .io | 4 | 1.0% |
What ConnectWise users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 416 domains.
| Type | Service | Domains | Share of ConnectWise users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 224 | 53.8% |
| Mailbox | Mimecast | 48 | 11.5% |
| Mailbox | Barracuda | 39 | 9.4% |
| Mailbox | Unknown / Other | 21 | 5.0% |
| Mailbox | Self-Hosted | 18 | 4.3% |
| Mailbox | Proofpoint | 16 | 3.8% |
SPF authentication and configuration governance
ConnectWise's email services are authorised in a domain's SPF record via an include mechanism. When a message claiming to originate from the domain arrives at a receiving mail server, that server checks the SPF record to verify the sender is authorised to use ConnectWise's infrastructure. If the SPF record is missing, outdated, or overlapping with other senders, mail sent through ConnectWise will fail SPF validation and trigger spam filters or rejection. Organisations using ConnectWise must monitor their SPF record for accuracy, test end-to-end authentication, and remove stale entries when the service is no longer in use.
See the full ConnectWise data page (KPI cards, trend, sample domains) →
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Frequently asked questions
What is ConnectWise, and should I test email deliverability with it?
ConnectWise is an email transmission service integrated into domains via SPF records. If your organisation uses ConnectWise to send mail, include it in deliverability testing to verify authentication and inboxing; if you see a ConnectWise SPF entry but do not use the service, that entry should be audited and removed if obsolete.
How many domains use ConnectWise?
416 domains in the Tranco top-1M use ConnectWise as their SaaS sender as of September 12, 2026 (0.07% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is ConnectWise common enough to affect email deliverability testing?
ConnectWise accounts for 0.07% 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.
Is ConnectWise growing or declining?
ConnectWise has been stable — its share moved -0.00 pp over the last 30 days (as of September 12, 2026).
Which countries or TLDs use ConnectWise most?
ConnectWise's largest TLD is .com (64.2% of its domains); it appears across 28 TLDs in total.