Transactional email · SMTP relaySend your app's emails with tinyRelay
tinyRelay is the SMTP relay and transactional email service from tinyCo, the team behind tinyEmail. Send password resets, receipts and alerts from your app over SMTP or a REST API, on the same infrastructure that sends 100M+ emails a day across tinyCo. Use it on its own or alongside your tinyEmail account.
SMTP or REST APISigned webhooksSet up with our team
Use casesWhat should you send through tinyRelay?
The one-to-one emails your app sends when a user does something. People expect them, and they need to reach the inbox.
Welcome and sign-up emails
Confirm a new account and say hello when someone registers in your app.
✉Welcome aboard, Ava
Password resets and verification
Reset links and verification codes, sent when a user asks for them.
✉Reset your password
Order confirmations and receipts
The confirmation and receipt a customer expects after every order.
✉Your order is confirmed
Shipping notifications
Let customers know when an order ships and how to track it.
✉Your order is on its way
Billing and invoices
Invoices, payment confirmations and failed-payment notices from your billing system.
✉Your invoice is ready
Account and security alerts
New sign-ins, changed settings and anything else your users need to know about their account.
✉New sign-in to your account
SMTP or REST APIConnect the way your stack works
Use SMTP if your app or software already sends email, or call the REST API from your own code. Both send on the same delivery infrastructure.
SMTP relay
You get SMTP credentials when you register. Point your app, servers or existing email software at tinyRelay.
REST API
Send from any language that can make HTTP requests, including Node.js, Python, PHP, Ruby and Go. There's no SDK to install.
Personalised batches
Send to many recipients in one request, each with their own attributes merged into the message.
- SENDAccepted for sendingSigned
- DELIVEREDAccepted by the inbox providerSigned
- OPENOpened by the recipientSigned
- CLICKClicked the reset linkSigned
WebhooksKnow what happened to every email
tinyRelay posts an event to your webhook URL as each message moves along, so your app always knows where things stand.
Signed events
Every webhook is signed with HMAC-SHA256, so your app can check it came from tinyRelay before acting on it.
Retries and replay
Deliveries are retried after timeouts and server errors, duplicates are suppressed for 24 hours, and payloads are kept for 5 days for replay.
19 bounce categories
Each bounce arrives with a category and description, from bad addresses to full mailboxes, so you can treat hard and soft bounces differently.
Getting startedSet up with our team
tinyRelay is set up together with you, so your domain and app are ready before your first send.
- 1
Get in touch
Tell the team about your app, the webhook URL you want events sent to, and the IP addresses you'll send from. Those IPs are allowlisted.
- 2
Authenticate your domain
Add the DKIM and SPF records for your sending domain, then confirm they're valid with a DNS check.
- 3
Start sending
Send from your app with your API key or SMTP credentials, and receive events at your webhook.
Keep exploringWhere tinyRelay fits in
Use it next to tinyEmail, whether you run a SaaS product, a store or your own stack.
tinyEmail REST APIRun your marketing email from code
Enterprise accounts manage campaigns, audiences, templates and reporting through the API, alongside tinyRelay.
SaaS platformsBuilding a SaaS product?
Account emails through tinyRelay, product updates and onboarding campaigns through tinyEmail.
EcommerceRunning a store?
Receipts and shipping updates through tinyRelay, repeat-sale workflows through tinyEmail.
FAQtinyRelay questions
Can't find your answer? Our team is here 24/7.
All FAQsWhat is tinyRelay?
tinyRelay is an SMTP relay and transactional email service from tinyCo, the team behind tinyEmail. It sends the one-to-one emails your app triggers, such as password resets, receipts and alerts, over SMTP or a REST API.
What's the difference between tinyRelay and tinyEmail?
tinyEmail is for marketing email: campaigns, newsletters and automated workflows sent to your audiences. tinyRelay is for transactional email that your app sends to one person when they do something. Both run on the same delivery infrastructure.
Do I need a tinyEmail account to use tinyRelay?
No. tinyRelay works as a standalone service, or alongside your tinyEmail account if you also send marketing email with tinyEmail.
Can I send over SMTP, or do I have to use the API?
Either. You get SMTP credentials when you register, so you can connect apps, servers or existing email software. Or call the REST API from any language that can make HTTP requests.
Which email events can my app receive?
tinyRelay posts SEND, DELIVERED, BOUNCED, OPEN, CLICK, UNSUBSCRIBE and SPAM events to your webhook URL. Every webhook is signed, bounces come with one of 19 documented categories, and payloads are kept for 5 days for replay. Your tinyRelay sending stats are also visible in your tinyEmail account.
How do I get started with tinyRelay?
Get in touch through tinyrelay.com and the team sets up your account with you. You share your webhook URL and the IP addresses you'll send from, add DKIM and SPF records for your domain, and receive your API key or SMTP credentials.
Is there a tinyRelay SDK?
No SDK is needed. The REST API works with any language that can make HTTP requests, including Node.js, Python, PHP, Ruby and Go, and SMTP works with any software that can send email over SMTP.
Send your app's emails with tinyRelay
SMTP relay and a transactional REST API on the same delivery infrastructure as tinyEmail, set up with you by our team.