- //Give Post-By-Email extending plugins full access to the content
- //Either the raw content or the content of the last quoted-printable section
- $content = apply_filters('wp_mail_original_content', $content);
+ /**
+ * Filter the original content of the email.
+ *
+ * Give Post-By-Email extending plugins full access to the content, either
+ * the raw content, or the content of the last quoted-printable section.
+ *
+ * @since 2.8.0
+ *
+ * @param string $content The original email content.
+ */
+ $content = apply_filters( 'wp_mail_original_content', $content );