Rename config validation source files

util/config/validators/validate_email.py

@@ -0,0 +1,25 @@
+from flask import Flask
+from flask_mail import Mail, Message
+
+from app import app
+from util.config.validators import BaseValidator
+
+class EmailValidator(BaseValidator):
+  name = "mail"
+
+  @classmethod
+  def validate(cls, config, user, user_password):
+    """ Validates sending email. """
+    with app.app_context():
+      test_app = Flask("mail-test-app")
+      test_app.config.update(config)
+      test_app.config.update({
+        'MAIL_FAIL_SILENTLY': False,
+        'TESTING': False
+      })
+
+      test_mail = Mail(test_app)
+      test_msg = Message("Test e-mail from %s" % app.config['REGISTRY_TITLE'],
+                         sender=config.get('MAIL_DEFAULT_SENDER'))
+      test_msg.add_recipient(user.email)
+      test_mail.send(test_msg)