diff --git a/lib/locomotive/steam/middlewares/auth.rb b/lib/locomotive/steam/middlewares/auth.rb
index 0d1adaf5..a69efa19 100644
--- a/lib/locomotive/steam/middlewares/auth.rb
+++ b/lib/locomotive/steam/middlewares/auth.rb
@@ -195,7 +195,8 @@ def smtp
               user_name:            smtp_config['user_name'],
               password:             smtp_config['password'],
               authentication:       smtp_config['authentication'] || 'plain',
-              enable_starttls_auto: (smtp_config['enable_starttls_auto'] || "0").to_bool,
+              enable_starttls_auto: (smtp_config['enable_starttls_auto'] || '0').to_bool,
+              ssl:                  (smtp_config['ssl'] || '0').to_bool,
             }
           end
         end
diff --git a/spec/unit/middlewares/auth_spec.rb b/spec/unit/middlewares/auth_spec.rb
index e3d0c064..abf628a3 100644
--- a/spec/unit/middlewares/auth_spec.rb
+++ b/spec/unit/middlewares/auth_spec.rb
@@ -24,6 +24,7 @@
         port: 25,
         authentication: 'plain',
         enable_starttls_auto: false,
+        ssl: false,
     ) }
 
     context 'no smtp metafields' do