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[ci skip] Update Action Mailer guide on how to add images #49712

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Oct 25, 2023
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[ci skip] Update Action Mailer guide on how to add images #49712

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6 changes: 5 additions & 1 deletion guides/source/action_mailer_basics.md
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Expand Up @@ -634,9 +634,13 @@ As the `:asset_host` usually is consistent across the application you can
configure it globally in `config/application.rb`:

```ruby
config.asset_host = 'http://example.com'
config.action_mailer.asset_host = 'http://example.com'
```

NOTE: Because we can't infer the protocol from the request, you'll need to
specify a protocol such as `http://` or `https://` in the
`:asset_host` config.

Now you can display an image inside your email.

```html+erb
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