📝 Document BCC use case

README.md

@@ -17,7 +17,7 @@ This gem allows you to override your mail delivery settings, globally or in a lo
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 ## Summary
@@ -52,6 +52,10 @@ Another very important use case for me is to transparently re-route email genera
 
 If you install this gem on a production server (which I don't always do), you can load up script/console and override the to/cc/bcc on all emails for the duration of your console session.  This allows you to poke and prod a live production instance, and route all email to your own inbox for inspection.  The best part is that this can all be accomplished without changing a single line of your application code.
 
+## Monitoring all email sent by server to a backup account
+
+You may want to add a BCC automatically (e.g. to [email protected]) to every email sent by your system, for customer service purposes, and this gem allows that.  Note that this may not be a good idea for all systems, for many reasons, e.g security!
+
 ## Using with a test suite as an alternative to the heavy email_spec
 
 [email_spec](https://github.com/bmabey/email-spec) is a great gem, with awesome rspec matchers and helpers, but it has an undeclared dependency on ActionMailer. Sad face.