Add note to readme about how to use GMail or other services to send e…

…mails.

Closes refinery#97.

readme.md

@@ -18,7 +18,7 @@ To install the migrations, run:
 
     rails generate refinery:inquiries
     rake db:migrate
-    
+
 Add pages to the database and you're done:
 
     rake db:seed
@@ -35,6 +35,10 @@ In summary you can:
 
 When inquiries come in, you and the customer are generally notified. As we implemented spam filtering through the [filters_spam plugin](https://github.com/resolve/filters_spam#readme) you will not get notified if an inquiry is marked as 'spam'.
 
+## How do I setup email to be sent from GMail, SendGrid or other service?
+
+Inquiries uses `actionmailer` under the hood so you can refer to [Rails Action Mailer guide](http://guides.rubyonrails.org/action_mailer_basics.html). For example to use GMail see [Action Mailer Configuration for GMail](http://guides.rubyonrails.org/action_mailer_basics.html#action-mailer-configuration-for-gmail) guide.
+
 ## How do I get Notified?
 
 Go into your 'Inquiries' tab in the Refinery admin area and click on "Update who gets notified"