<p> and <br> stripped from html mail content

[JosiahCarberry]

The content of the email does not correctly display line breaks and paragraphs when sent as html (it is OK when sent as plain text). The problem occurs either when the email content is edited using the visual tab of the editor, or if it is edited using the text tab and html tags are manually introduced. In the final email sent, all the

and
tags have been removed. However, other tags in the email, such as , are correctly left in place.

Woo Custom Email plugin version 2.0.6 WooCommerce version 2.6.4 Wordpress version 4.6.1

Note that the default Wordpress editor is being used. There is no problem with the default MooCommerce emails. There is no problem with the editor anywhere else in WordPress.