mmmhhh...
I don't find anything about this subject...
I've added :
add_filter( 'wp_mail_content_type', 'set_content_type' );
function set_content_type( $content_type ) {
return 'text/html';
}and installed swift mail plugin as requested by sendGrid WP plugin
but it doesn't change anything ...
Still get all mails in plain/text format
Any idea please ?
:(