---
title: Adapters
description: Configure an explicit SMTP socket adapter for a supported runtime.
icon: Plug
source: "src/adapters/node.ts"
---

<Callout title="The one rule">Use an adapter only when SMTP auto-detection is not suitable for your runtime.</Callout>

| Runtime | Import | Class |
| --- | --- | --- |
| Node.js | `sently/adapters/node` | `NodeAdapter` |
| Bun | `sently/adapters/bun` | `BunAdapter` |
| Deno | `sently/adapters/deno` | `DenoAdapter` |
| Cloudflare Workers | `sently/adapters/cf` | `CloudflareAdapter` |

```ts
import { createSMTPMailer } from "sently/smtp";
import { NodeAdapter } from "sently/adapters/node";

const mailer = await createSMTPMailer({ host: "smtp.example.com", adapter: new NodeAdapter() });
```

<Accordions><Accordion title="Why does SMTP fail on an edge runtime?">Use an HTTP transport, or provide the runtime's supported SMTP adapter.</Accordion></Accordions>

<Cards><Card title="SMTP transport" href="/docs/transports/smtp" /></Cards>