Uhserver / Tucows shared mailbox provider
According to Live Direct Marketing's daily Tranco top-1M scan (September 12, 2026), Uhserver / Tucows shared is the mailbox provider for 164 domains — 0.02% of 665,310 domains with MX records. Detection method: primary MX record (lowest preference).
Key facts
- 164 domains in the Tranco top-1M use Uhserver / Tucows shared (0.02% of domains with MX records).
- Snapshot date: 2026-09-12 — recomputed every day.
- Strongest TLD: .com.br (89.0% of its domains).
- Region skew: Brazil.
- Most co-used service: SendGrid (Twilio).
- Directory category: hosting mail bundle.
Why Uhserver / Tucows shared appears in this category
Shared mailbox infra used by various resellers (uhserver.com).
We classify it as a hosting mail bundle from primary MX record (lowest preference) matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
Uhserver is a shared email hosting service operated by Tucows, a longstanding provider of domain registration, web hosting, and email infrastructure. The service sits on shared mailbox infrastructure rather than dedicated hardware, making it a cost-effective choice for smaller and regional organisations.
Uhserver's footprint is concentrated in Brazil's .com.br space, where it hosts mail for a large number of smaller to mid-market websites rather than enterprises. Its prevalence—often appearing alongside SendGrid (owned by Twilio) in the same site's mail infrastructure—makes it a useful proxy for understanding regional email reception patterns in Portuguese-speaking markets and shared-hosting environments more broadly.
Where Uhserver / Tucows shared sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 8 | 4.9% |
| Top 1,000,000 | 156 | 95.1% |
| Unranked | 0 | 0.0% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com.br | 146 | 89.0% | |
| .com | 11 | 6.7% | |
| .br | 6 | 3.7% | |
| .club | 1 | 0.6% |
What Uhserver / Tucows shared users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 164 domains.
| Type | Service | Domains | Share of Uhserver / Tucows shared users |
|---|---|---|---|
| ESP | SendGrid (Twilio) | 14 | 8.5% |
| ESP | RD Station (BR) | 9 | 5.5% |
| ESP | Amazon SES | 6 | 3.7% |
| ESP | Brevo (ex-Sendinblue) | 3 | 1.8% |
| ESP | MailerSend | 3 | 1.8% |
| ESP | KMITD (TH) | 2 | 1.2% |
| ESP | SendPulse | 2 | 1.2% |
| ESP | Akna | 2 | 1.2% |
| ESP | Mailgun | 2 | 1.2% |
| ESP | Mailtrap | 1 | 0.6% |
Regional representation in shared hosting infrastructure
Uhserver's dominance in Brazil reflects broader patterns in regional web hosting: smaller organisations, local e-commerce sites, and regional service providers tend to cluster on shared infrastructure in their own market rather than migrate to global CDN-backed providers. For senders targeting Brazil or maintaining a mailbox on Uhserver's network, understanding its position in the shared-hosting ecosystem is relevant to assessing inbox placement in that region. Reputation on Uhserver mailboxes depends partly on the shared IP pool's overall sending patterns—meaning inbound filtering may reflect both sender behaviour and the broader reputation of Tucows' infrastructure.
See the full Uhserver / Tucows shared data page (KPI cards, trend, sample domains) →
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Frequently asked questions
Should I test my emails against Uhserver mailboxes?
Testing against Uhserver is worthwhile if your audience includes smaller organisations or Brazilian recipients, or if you send region-specific campaigns in Portuguese-speaking markets. Uhserver's shared infrastructure characteristics mean inbox filtering may differ from enterprise platforms like Google Workspace or Microsoft 365.
How many domains use Uhserver / Tucows shared?
164 domains in the Tranco top-1M use Uhserver / Tucows shared as their mailbox provider as of September 12, 2026 (0.02% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Is Uhserver / Tucows shared common enough to affect email deliverability testing?
Uhserver / Tucows shared accounts for 0.02% of domains with MX records 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.
Which countries or TLDs use Uhserver / Tucows shared most?
Uhserver / Tucows shared's largest TLD is .com.br (89.0% of its domains); it appears across 4 TLDs in total.