feel free to type whatever you want to type wherever you want to type it
you could also selectively display your message with a conditional in an action/filter of some sort if the user is not logged in.
something like

<?php
if ( !is_user_logged_in() ) {
    echo 'special discounts for registered users';/*or whatever you want to say */
}
?>

there are endless ways to do this really

having had a rummage myself as to whether printing multiple copies with cloudprint is doable or reasonably simple to setup with printers – i actually could not find anything straight forward…

therefore 3.5.1 added a multiple copies option (though this might still slow things down somewhat depending on the number of copies)

maybe this helps someone…

menu bars will be your theme’s responsibility (unless we are talking about different things)
so you will have to ask the theme developers

PS: at the moment i can only come up with running the thing 2x by adding the following to your functions php

add_action( 'wppizza_on_order_executed', 'my_wppizza_google_cloudprint', 99);
function my_wppizza_google_cloudprint($orderid){
	$wppizzaGCP=new WPPIZZA_GOOGLE_CLOUDPRINT();
	$wppizzaGCP->wppizza_google_cloudprint_order($orderid);
	return;
}

not tested, but will probably also slow down the last stage of actually submitting the order as it will be running 2x of course…

or perhaps just adding

add_action( 'wppizza_on_order_executed', 'wppizza_google_cloudprint_execute', 99);

might also work

sounds like the domain was blocked / blacklisted though, not the email as such

and as the message gets send, there are no errors. what your email server/host considers spam is something you have to take up with them

>do you want the whole thinmg?
no

all the info you need is in that message you’ve received.
“For more information, please see….”

you could also – temporarily perhaps – set the mail delivery to “HTML” as that *might* give you more info on what the problem is

first question :
when you said “I then disabled all plugins but wppizza.” did you also disable wordfence i.e disabled literally ALL other plugins ?

>wp-mail cannot instantiate….

could be a million things
https://www.google.co.uk/?gws_rd=ssl#q=could+not+instantiate+mail+function