transactional email infrastructure
Email agents trust.
Send. Receive. Prove.
API and SMTP for your software, inboxes your agents can read safely, and a record of everything, ready for audit. Pix, Brazilian invoices, support in Portuguese.
No card required · Domain live in minutes · The free plan never expires
POST /v1/send → 202 "accepted"
100%
on the NIC.br email test — measured on our own domain
100%
on Internet.nl, the Dutch national cybersecurity center’s test
6
SPF · DKIM · DMARC · MTA-STS · TLS-RPT · ARF — out of the box, not as add-ons
2
source providers with one-click import: SendGrid and Postmark
Every email you receive can be delivered to
Another email address
Slack
Telegram
Signed webhook
Discordcoming soon
How it works
Infrastructure that tells the truth.
You do not need one more pretty dashboard. You need to know, right now, what happened to that message.
1Send
One request. One outcome per recipient.
API or SMTP, same domain, same quota. Five recipients are five outcomes, never one flattened field.
{
"from": "agent@yourdomain.com",
"to": ["ana@customer.example", "rui@customer.example", "lia@customer.example"],
"subject": "Your order 8812 is out for delivery",
"idempotencyKey": "pedido-8812"
}2Receive
Every message arrives with a verdict.
Before your agent reads it, the verdict says whether it carries instructions written for the machine. A dangerous one waits for a person to release it.
See inboundwebhook · Telegram · Slack · email3Prove
Proof of every send, and of who changed what.
Each message’s timeline, with TLS and authentication, and an audit trail that does not expire.
pedido-8812d=yourdomain.com · SPF and DMARC aligned250 2.0.0 OKPlatform
What comes with the account.
What production email asks for, with no separate module and no spreadsheet on the side.
Domain live in minutes
The wizard says what to publish and checks the DNS live, on every visit.
1,284 uses in the last 30 days
Every key with an owner and a use
Who created it, when it was last used, and the color that gives away an idle key.
- The sender domain («from») is not verified in this account.
- Publish the DNS records under Domains and click Verify; then send again.
API errors with the fix beside them
Every call with its request and response, and «Help me fix» on the ones that failed.
Send policies
Block a destination, allow a list, force transactional — at send time, with a simulator.
Suppressions with compliance
Bounced, complained, unsubscribed: each with its source. A complaint can never be deleted.
Reputation as routine
Warmup that counts the days you actually sent; a dedicated IP when it makes sense.
Signed webhooks
Accepted, delivered, bounced, complaint — HMAC-SHA256 with a timestamp, retries and idempotency.
NPS and CSAT surveys
The score is the click, inside the message. Bots and link scanners do not vote.
DMARC and TLS-RPT reports
From Business up, the aggregate XML becomes a page you read in a minute.
Audit trail
Who did it, when and what changed — our support included.
Migration with a way back
Suppressions, domains and webhooks from SendGrid or Postmark, by reading. Provider by provider.
MCP server
Claude, Cursor, VS Code and other clients call the API as tools, within the key’s scopes. Connect your agent.
Solutions
For senders whose email the recipient is waiting for.
We are not a campaign platform: only messages people open because they need them go through here.
Fintech & payments
Access codes, receipts, payment notices — with a dedicated IP and the outcome of each one.
Healthcare
Appointments, exam prep, results — and the patient’s reply comes back through the same channel.
B2B SaaS
Invites, password resets, alerts, invoices — API and SMTP on one base, a webhook per event.
Logistics
Confirmations, tracking, delivery windows — predictable pricing at high volume.
Pricing
Infrastructure pricing, not marketing-platform pricing.
In US dollars, per month, on sent volume. No fee per tracking event and no free plan that expires.
20%
below the big providers’ equivalent tier from 250,000 a month — $199 for a quarter million. The receipt is in the table below.
$0
forever: a thousand emails a month, no card — our free plan never expires.
Free
$0
1,000 emails/mo, forever. · 1 domain · API and SMTP · inbound included · 3-day logs · no card required
Start freeStarter
$15/mo
50,000/mo
- ·5 domains
- ·Overage $1.20/1k
- ·15-day logs
- ·Webhooks and templates
- ·Send policies
Plus
$69/mo
100,000/mo
- ·10 domains
- ·Overage $0.95/1k
- ·20-day logs
- ·Provider migration
- ·NPS and CSAT surveys
Growth
$199/mo
250,000/mo
- ·25 domains
- ·Overage $0.88/1k
- ·30-day logs
- ·Provider migration
- ·NPS and CSAT surveys
- ·Priority support
Want more? We have it.500K and 1M emails a month. · Business $359 · Scale $599 · dedicated IP · lower overageSee the plansHide
Business
$359/mo
500,000/mo. · unlimited domains · overage $0.76/1k · 45-day logs · 1 dedicated IP with warmup · DMARC and TLS-RPT reports
Talk to usScale
$599/mo
1,000,000/mo. · unlimited domains · overage $0.60/1k · 60-day logs · dedicated IP + pool · deliverability oversight
Talk to usEnterprise
custom
Above 1 million a month. · IPs as agreed · 365-day logs · custom contract · sub-operators and org accounts
Talk to usEverything each plan includes: limits, retention, Pix and invoice, support, region
| Free | Starter | Plus | Growth | Business | Scale | Enterprise | |
|---|---|---|---|---|---|---|---|
| Emails per month | 1,000 | 50,000 | 100,000 | 250,000 | 500,000 | 1,000,000 | custom |
| Per day | 100 | 5,000 | 10,000 | 25,000 | 50,000 | 100,000 | custom |
| Per minute | 60 | 600 | 1,200 | 3,000 | 6,000 | no cap | no cap |
| Sending domains | 1 | 5 | 10 | 25 | unlimited | unlimited | unlimited |
| Readable sending record | 3 days | 15 days | 20 days | 30 days | 45 days | 60 days | 365 days |
| Received messages kept | 30 days, on every plan — and received messages do not count against the sending quota | ||||||
| Inbound with a safety verdict, quarantine and per-mailbox policies | on every plan | ||||||
| API and SMTP | on every plan, with credentials restricted by domain and by IP | ||||||
| Audit trail | on every plan, never purged, visible in the panel | ||||||
| Pix and boleto, with a Brazilian invoice | — | on paid plans contracted in Brazil (automatic NFS-e); outside Brazil, card, in US dollars | |||||
| Support in Portuguese | on every plan, by email, Monday to Friday, 09:00–18:00 (UTC−3) — and in English too | ||||||
| Region | processing and main storage in the United States; sending nodes in the United States and Romania — the sub-processor list says who runs what, and where | ||||||
Are you an agent? See the prices in plain text.
the same volume, across providers
Public prices, August 2026 — the same volume priced at each provider’s published tier.
| You send | SendGrid | Mailgun | Postmark | Oveyon |
|---|---|---|---|---|
| 1,000 | 60-day trial (no free tier) | 100/day free | 100/mo free | free, no expiry |
| 10,000 | $19.95 | $15 | $15 | $15 (50k included) |
| 50,000 | $19.95 | $35 | contact sales | $15 |
| 100,000 | $89.95 | $90 | contact sales | $69 |
| 250,000 | ~$249 (300K tier) | contact sales | contact sales | $199 |
| 500,000 | ~$449 (700K tier) | contact sales | contact sales | $359 |
| 1,000,000 | ~$749 (1.5M tier) | contact sales | contact sales | $599 |
Entry prices as published; tiers above 100K from secondary sources (marked ~). Mailgun and Postmark from their public pricing pages; both hide higher volumes behind sales.
questions from whoever integrates
How are sends counted?
Per recipient: one message to five people counts as five. The daily and monthly quotas apply the same way to the API and to SMTP, and the response to a batch says how many recipients you asked for when the balance does not cover them all. A draft a person rejected before it left gives the quota back.
And received messages, how are they counted?
They do not count against the sending quota. Each received message is delivered at acceptance through the mailbox channels — signed webhook, Telegram, Slack or forwarding — and kept for 30 days, readable through the API (GET /v1/inbound/{uid}) and in the panel. Then it is deleted.
What happens when I hit the daily limit?
On the API, 429 quota_exceeded with window (daily or monthly), used, limit, retryAfter in UTC and the Retry-After header: back off until then, the window turns on its own. On SMTP, the RCPT is refused with 5.7.1 stating the window, the usage and when it resets — a refusal that holds for the day, so your MTA does not retry blindly. Nothing is queued above the cap.
Can I have one key per domain?
Yes. Every credential, API or SMTP, can be restricted to domains of the account: a sender outside them is refused on the spot (domain_not_allowed_for_credential on the API, 550 5.7.1 on SMTP). An API key also has scopes (send, read:inbound, approve:holds…), restriction by IP or CIDR and rotation with a 72-hour window.
SMTP and API on the same account?
Yes: same domain, same quota, same suppressions, same record. SMTP at smtp.oveyon.com, port 587 with STARTTLS or 465 with TLS — the credential is generated by the server and shown once. API at https://api.oveyon.com/v1, with Authorization: Bearer.
What is kept, and for how long?
The sending record — who, when, the outcome per recipient — stays readable for your plan’s window, from 3 to 365 days; the metadata is purged after 400 days. The content of what you send is archived only if you turn the archive on, and for 30 days. Received messages are kept for 30 days. The audit trail does not expire.
How do I pay, and is there an invoice?
Contracting in Brazil, Pix or boleto, with an NFS-e issued for each payment. Outside Brazil, card, in US dollars. The free plan asks for no card and never expires.
Send, today, the first email you can prove arrived.
Start with the domain you already have — or bring over what lives there: migration is pure reading and rolls back in one click.
A thousand emails a month, no card, no expiry date.