---
title: Transports
description: Choose a provider transport for a channel sender.
icon: Truck
source: "package.json"
---

Transports connect a sently channel sender to a delivery provider.
Pick the transport that matches the channel you are sending on.

<Callout title="The one rule">Keep application delivery calls on a sently channel sender and replace only its transport when you change providers.</Callout>

<Steps>
  <Step title="Import a sender and its transport">

```ts
import { createMailer } from "sently/mailer";
import { ResendTransport } from "sently/transports/resend";

const mailer = await createMailer({
  transport: new ResendTransport({
    apiKey: process.env.RESEND_API_KEY!,
  }),
});
```

  </Step>
  <Step title="Send through the channel">

```ts
await mailer.send({
  from: "hello@example.com",
  to: "person@example.com",
  subject: "Welcome",
  text: "Thanks for joining.",
});
```

  </Step>
</Steps>

## Exported transports

Every import below is an exported package subpath.

| Transport | Channel | Import |
| --- | --- | --- |
| [SMTP](./smtp) | Email | `sently/transports/smtp` |
| [Resend](./resend) | Email | `sently/transports/resend` |
| [SendGrid](./sendgrid) | Email | `sently/transports/sendgrid` |
| [Postmark](./postmark) | Email | `sently/transports/postmark` |
| [Mailgun](./mailgun) | Email | `sently/transports/mailgun` |
| [SES](./ses) | Email | `sently/transports/ses` |
| [Brevo](./brevo) | Email | `sently/transports/brevo` |
| [MailerSend](./mailersend) | Email | `sently/transports/mailersend` |
| [Plunk](./plunk) | Email | `sently/transports/plunk` |
| [SparkPost](./sparkpost) | Email | `sently/transports/sparkpost` |
| [Mailtrap](./mailtrap) | Email | `sently/transports/mailtrap` |
| [Mailpit](./mailpit) | Email (dev) | `sently/transports/mailpit` |
| [Inbucket](./inbucket) | Email (dev) | `sently/transports/inbucket` |
| [Loops](./loops) | Email | `sently/transports/loops` |
| [Cloudflare Email](./cloudflare-email) | Email | `sently/transports/cloudflare-email` |
| [SNDR](./sndr) | Email | `sently/transports/sndr` |
| [Hostinger](./hostinger) | Email | `sently/transports/hostinger` |
| [Twilio SMS](./twilio-sms) | SMS | `sently/transports/twilio-sms` |
| [Msegat](./msegat) | SMS | `sently/transports/msegat` |
| [Unifonic](./unifonic) | SMS | `sently/transports/unifonic` |
| [WhatsApp Cloud](./whatsapp-cloud) | WhatsApp | `sently/transports/whatsapp-cloud` |
| [Web Push](./webpush) | Push | `sently/transports/webpush` |
| [FCM](./fcm) | Push | `sently/transports/fcm` |
| [Taqnyat](./taqnyat) | Email · SMS · WhatsApp | `sently/transports/taqnyat-mail`, `taqnyat-sms`, `taqnyat-whatsapp` |

For retry, fallback, preview, and idempotency wrappers, see [Decorators](../decorators).

## Channel contracts

| Channel | Sender | Transport contract |
| --- | --- | --- |
| Email | `createMailer` / `createSMTPMailer` | `Transport` |
| SMS | `createSmsSender` | `SmsTransport` |
| WhatsApp | `createWhatsAppSender` | `WhatsAppTransport` |
| Push | `createPushSender` | `PushTransport` |

## Troubleshooting

<Accordions>
  <Accordion title="Can I use an email transport for SMS or WhatsApp?">
    No. A transport implements one channel contract. Choose a transport listed for the channel sender you use.
  </Accordion>
  <Accordion title="How do I add retries or fallback?">
    Wrap any channel transport with a [decorator](../decorators), then pass the wrapper to the matching sender. See also the [failover guide](../guides/failover).
  </Accordion>
  <Accordion title="Is every exported transport equally Supported?">
    No. See the [support matrix](../get-started/support-matrix) for Supported vs Available.
  </Accordion>
</Accordions>

## Learn more

- [Support matrix](../get-started/support-matrix)
- [Decorators](../decorators)
- [Failover](../guides/failover)
- [Email channel](../channels/email)
- [SMS channel](../channels/sms)
- [Transport contracts](../reference/transport-contracts)

## Next

<Cards>
  <Card title="Support matrix" href="/docs/get-started/support-matrix" />
  <Card title="Decorators" href="/docs/decorators" />
  <Card title="Failover" href="/docs/guides/failover" />
</Cards>