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+# Mail Best Practices
+
+## Implement `ShouldQueue` on the Mailable Class
+
+Makes queueing the default regardless of how the mailable is dispatched. No need to remember `Mail::queue()` at every call site — `Mail::send()` also queues it.
+
+## Use `afterCommit()` on Mailables Inside Transactions
+
+A queued mailable dispatched inside a transaction may process before the commit. Use `$this->afterCommit()` in the constructor.
+
+## Use `assertQueued()` Not `assertSent()` for Queued Mailables
+
+`Mail::assertSent()` only catches synchronous mail. Queued mailables silently pass `assertSent`, giving false confidence.
+
+Incorrect: `Mail::assertSent(OrderShipped::class);` when mailable implements `ShouldQueue`.
+
+Correct: `Mail::assertQueued(OrderShipped::class);`
+
+## Use Markdown Mailables for Transactional Emails
+
+Markdown mailables auto-generate both HTML and plain-text versions, use responsive components, and allow global style customization. Generate with `--markdown` flag.
+
+## Separate Content Tests from Sending Tests
+
+Content tests: instantiate the mailable directly, call `assertSeeInHtml()`.
+Sending tests: use `Mail::fake()` and `assertSent()`/`assertQueued()`.
+Don't mix them — it conflates concerns and makes tests brittle.