According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), ConnectWise is the SaaS sender for 434 domains — 0.07% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
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.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 3 | 0.7% |
| Top 100,000 | 29 | 6.7% |
| Top 1,000,000 | 377 | 86.9% |
| Unranked | 25 | 5.8% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 279 | 64.3% | |
| .org | 31 | 7.1% | |
| .net | 26 | 6.0% | |
| .ca | 17 | 3.9% | |
| .com.au | 17 | 3.9% | |
| .co.uk | 11 | 2.5% | |
| .edu | 10 | 2.3% | |
| .gov | 7 | 1.6% | |
| .nl | 6 | 1.4% | |
| .io | 4 | 0.9% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 434 domains.
| Type | Service | Domains | Share of ConnectWise users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 234 | 53.9% |
| Mailbox | Barracuda | 45 | 10.4% |
| Mailbox | Mimecast | 45 | 10.4% |
| Mailbox | Unknown / Other | 23 | 5.3% |
| Mailbox | Self-Hosted | 18 | 4.1% |
| Mailbox | Google Workspace | 18 | 4.1% |
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 If the SPF record is missing, outdated, or overlapping with other senders, mail sent through ConnectWise will fail SPF validation and trigger spam filters or rejection.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) →
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.
434 domains in the Tranco top-1M use ConnectWise as their SaaS sender as of July 13, 2026 (0.07% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
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.
ConnectWise has been stable — its share moved +0.00 pp over the last 30 days (as of July 13, 2026).
ConnectWise's largest TLD is .com (64.3% of its domains); it appears across 28 TLDs in total.