Use SMTP/Mailgun for backup notifications

site-cookbooks/backup/recipes/default.rb

@@ -32,6 +32,8 @@ gem_package 'backup' do
   version '5.0.0.beta.2'
 end
 
+smtp_credentials = Chef::EncryptedDataBagItem.load('credentials', 'smtp')
+
 backup_data = Chef::EncryptedDataBagItem.load('credentials', 'backup')
 backup_dir = node["backup"]["dir"]
 directory backup_dir
@@ -46,8 +48,12 @@ template "#{backup_dir}/config.rb" do
             s3_secret_access_key: backup_data["s3_secret_access_key"],
             s3_region: backup_data["s3_region"],
             encryption_password: backup_data["encryption_password"],
+            mail_from: "backups@kosmos.org",
             mail_to: "ops@5apps.com",
-            mail_from: "backups@kosmos.org"
+            mail_address: 'smtp.mailgun.org',
+            mail_domain: 'kosmos.org',
+            mail_user_name: smtp_credentials["user_name"],
+            mail_password: smtp_credentials["password"]
 end
 
 template "#{backup_dir}/models/default.rb" do