Add rake task for google schema whitelisting.

1 files changed, 17 insertions, 0 deletions

diff --git a/doc/integration/gitlab_buttons_in_gmail.md b/doc/integration/gitlab_buttons_in_gmail.md
index 5cfea5a90f8..0816509c557 100644
--- a/doc/integration/gitlab_buttons_in_gmail.md
+++ b/doc/integration/gitlab_buttons_in_gmail.md
@@ -9,3 +9,20 @@ If correctly setup, emails that require an action will be marked in Gmail.
 To get this functioning, you need to be registered with Google.
 [See how to register with google in this document.](https://developers.google.com/gmail/markup/registering-with-google)
 
+To aid the registering with google, GitLab offers a rake task that will send an email to google whitelisting email address from your GitLab server.
+
+To check what would be sent to the google email address, run the rake task:
+
+```bash
+bundle exec rake gitlab:mail_google_schema_whitelisting RAILS_ENV=production
+```
+
+**This will not send the email but give you the output of how the mail will look.**
+
+Copy the output of the rake task to [google email markup tester](https://www.google.com/webmasters/markup-tester/u/0/) and press "Validate".
+
+If you receive "No errors detected" message from the tester you can send the email using:
+
+```bash
+bundle exec rake gitlab:mail_google_schema_whitelisting RAILS_ENV=production SEND=true
+``