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-rw-r--r--guides/source/configuring.md6
1 files changed, 6 insertions, 0 deletions
diff --git a/guides/source/configuring.md b/guides/source/configuring.md
index 7136205b75..6b3f808c6a 100644
--- a/guides/source/configuring.md
+++ b/guides/source/configuring.md
@@ -667,6 +667,12 @@ There are a number of settings available on `config.action_mailer`:
config.action_mailer.interceptors = ["MailInterceptor"]
```
+* `config.action_mailer.preview_interceptors` registers interceptors which will be called before mail is previewed.
+
+ ```ruby
+ config.action_mailer.preview_interceptors = ["MyPreviewMailInterceptor"]
+ ```
+
* `config.action_mailer.preview_path` specifies the location of mailer previews.
```ruby