Mail Gateway
transactional email over API and SMTP
Send invoices, password resets and notifications from your application with an HTTP API or over SMTP, signed with your own domain. No mail server to run, no IP reputation to nurse, and no brand other than yours in front of your customers.
$ curl -X POST https://mg.truo.cloud/v1/emails \
-H "Authorization: Bearer mg_live_••••••••" -d '{"from":"invoices@yourdomain.com","to":["ana@customer.com"],"subject":"Your invoice"}'
✓ accepted · delivery event in your panel
HTTP API
POST /v1/emails
One endpoint, your API key as Bearer and a JSON body. Every send responds with the message id.
SMTP
smtp.mg.truo.cloud:465
Your own username and password per service, over SMTPS. Port 465 only in this first version.
YOUR OWN DKIM
BYODKIM, selector mg
We generate the key and encrypt it at rest: you sign with your domain, not ours.
EVENTS
Accepted, delivered, bounced
Every send event is recorded and feeds the same history we use to bill you.
TWO LANES, ONE ACCOUNT
Send over API or over SMTP
The API lane is one HTTP call with your API key. The SMTP lane gives you your own username and password to point any existing framework or mail server at. Both share domains and billing.
API lane (HTTP)
mg.truo.cloud/v1/emailsPOST https://mg.truo.cloud/v1/emails
Authorization: Bearer mg_live_••••••••
{ from, to, subject, html }
- Bearer auth with your API key and a JSON body: from, to, subject and html or text.
- The sender domain (from) must be verified on your account before you can send.
- Rate limiting per API key, meant to stop abuse, not your application's normal traffic.
SMTP lane (SMTPS 465)
smtp.mg.truo.cloud:465host: smtp.mg.truo.cloud
port: 465, secure: true
auth: { user, pass }
- Your own username and password per service, manageable from the TruoCloud panel.
- Port 465 with TLS on connect only (SMTPS); no 587 in this first version.
- SMTP sends land in the same log and the same invoice as the API ones.
Your domain signs the mail, not ours
We generate your DKIM key and you publish a single TXT under the mg selector. SPF, MAIL FROM and DMARC point at TruoCloud domains: nothing in your DNS reveals the delivery engine.
BYODKIM
we generate the DKIM key, encrypted at rest
Selector mg
the TXT is published under your own selector, not a shared one
0
mentions of the delivery provider in your DNS
Your own button
re-verify the domain whenever you want, from the panel
Your domain's DNS records
yourdomain.comDKIM selector: mg · MAIL FROM: bounces.yourdomain.com
polling verification, with a button to re-check whenever you want
OBSERVABILITY
Every message, with its history
The send lifecycle is recorded whether it came over API or SMTP: accepted, delivered, bounced or complained, all in the same place.
Per-message log
Recipient, subject, domain and status, for API and SMTP sends in the same history.
Events over webhook
Delivery, bounce and complaint arrive via Configuration Set and feed the same data we bill from.
Per-service isolation
Each service gets its own Configuration Set: a suspension doesn't touch your other domains.
Automatic cutoffs
On abuse or an exceeded quota, sending is cut within seconds, before it damages your reputation.
Sample send log
an illustrative view of the log you'll see in the panel, by domain and recipient
PRICING
Simple pricing, pay by volume
You pay for the plan and, if you go over, only the overage. No free plan for now.
Dev
10,000 emails/mo
Overage $1.00 / 1,000
No domain limit
- API and SMTP included
- Your own DKIM key (BYODKIM)
- Full event log
- Guided DNS wizard
Startup
50,000 emails/mo
Overage $0.75 / 1,000
No domain limit
- API and SMTP included
- Your own DKIM key (BYODKIM)
- Full event log
- Guided DNS wizard
Business
200,000 emails/mo
Overage $0.45 / 1,000
No domain limit
- API and SMTP included
- Your own DKIM key (BYODKIM)
- Full event log
- Guided DNS wizard
Scale
1,000,000 emails/mo
Overage $0.30 / 1,000
No domain limit
- API and SMTP included
- Your own DKIM key (BYODKIM)
- Full event log
- Guided DNS wizard
More than a million emails a month? We'll build the plan with you. Contact
Prices in USD, billed monthly from the TruoCloud panel. Overage is billed per additional 1,000 emails above the plan's quota.
SPEC SHEET
Specifications
USE CASES
What transactional email is for
Invoices and receipts
Documents that can't land in spam, signed with your own domain.
Password resets and verification
One-time codes and links sent straight from your application.
Product notifications
Alerts and notices from your SaaS or backend, without running your own mail server.
Apps that already speak SMTP
WordPress, Laravel or an existing mail server: you change host and credentials, not the code.
LIMITS TO KEEP IN MIND
Port 465 only, with TLS on connect: if your framework defaults to 587, you'll need to change it. Messages up to 40 MB. This is transactional email, not bulk sending or mailboxes: if you're after mailboxes with calendar and files, that's Business Email. Corporate Email