Subscribe/unsubscribe mail

For html issue this do the job :

Replace lines 681,698

wp_mail($email,$suscribe_title,$suscribe,'From:'.$sender.$this->eol);

to

wp_mail($email,$suscribe_title,html_entity_decode($suscribe, ENT_QUOTES, 'UTF-8' ),'From:'.$sender.$this->eol);

and replace 713

wp_mail($email,$unsuscribe_title,$unsuscribe,'From:'.$sender.$this->eol);

to

wp_mail($email,$unsuscribe_title,html_entity_decode( $unsuscribe, ENT_QUOTES, 'UTF-8' ),'From:'.$sender.$this->eol);

Maybe do the same on subject is useful.

For name in mails add this code do the trick in function.php

add_filter( 'wp_mail_from_name', 'custom_wp_mail_from_name' );
function custom_wp_mail_from_name( $original_email_from ) {
	return 'Name';
}

So email name is handled by theme and not the extension.
An override can be useful, what do you think about it ?