How to add a line break between each components in Email template in Webforms
You can add every form component individuell with a syntax like [submission:values:field_key:label]
[submission:values:field_key:nolabel]
Please check the Tokens in your email settings or the following link https://www.drupal.org/node/2490648

You can also modify the webform-submission.tpl.php file and adjust it for your email.