ok, that’s because you are using (I assume ?!) a gmail/googlemail, hotmail or yahoo address

none of these understand plaintext properly (not my fault – they used to , but not anymore. not the last time i checked anyway).
for instance plaintext is not displayed in those using monospaced fonts unless you jump through many hoops and it would ask too much of the average user to set this up. therefore plaintext email would look like a right old mess

therefore the plugin forces html with the “pre” tags to make this legible. you will find that not using a gmail/hotmail/yahoo address will give you proper plaintext

alternatively there is also a filter that checks for those email addresses you could use to unset this behaviour for gmail
like so

/* not tested as such but should work */
add_filter('wppizza_email_plaintext_to_webmail_domains', 'my_filter');
function my_filter($email_domains){
unset($email_domains[0]);//where 0 = @gmail. | 1 = @googlemail. | 2 = @outlook | 3 = @yahoo.| 4 =@hotmail.
return $email_domains
}

but if you send plaintext emails to customers that have gmail accounts and use that filter, they would get the same mess

did you “verify that the domain or address is defined for this server.”
test smtp emails simply use the default wp_mail from address (something like [email protected])
whereas “live” emails so to speak use the settings in wppizza->settings ->emails

i guess i should probably change this to be used for test emails too at some point.
as it is what it is at the moment, have you tried doing a test email with an actual test order ?

PS: when you test it, it does not even use any saved parameters but directly what you have typed into the formfields

have you used/run the test there (i assume we are talking about the smtp settings section in the wppizza plugin) ?
what does the output give you ?

what exact html are you getting ?

a) you dont need any of the require(WPPIZZA_PATH.’classes/class.wppizza.order.php’); etc
this is wppizza v2 stuff
please see https://docs.wp-pizza.com/developers/?section=action-wppizza_on_order_execute
all details are in the $order_details parameters
b) i cannot tell you what else you need for your goodcom printer to work. i have no knowledge about it. you will have to refer to the manufacturer information

(of course, if someone else reads this, has knowledge about it and wants to chime in, please go ahead)

i can assure you, what’s private there is irrelevant . (essentially it says configure the printer following the user manual, to pull orders in “php mode””

its the original post that has the instructions

that said, that’s also based on wppizza v2 in v3 this would have to be based on this
https://docs.wp-pizza.com/developers/?section=action-wppizza_on_order_execute

in other words: you need to translate the plugin using the po files

>which file should I change
none
you should look at the shortcode attributes – especially the elements attribute
https://docs.wp-pizza.com/shortcodes/?section=by-category

already doable with these filters / functions

https://docs.wp-pizza.com/developers/?section=filter-wppizza_filter_options
https://docs.wp-pizza.com/developers/?section=global-wppizza-functions
i.e somethimg along these lines

add_filter('wppizza_filter_options', 'my_prefix_my_options');
function my_prefix_my_options($wppizza_options){
/* 
on pickup , set your other closing times as you wish, 
below closes shop everyday at 9PM 
except on sunday where it will close at 8:30
*/
if(wppizza_is_pickup()){
$wppizza_options['openingtimes']['opening_times_standard'][0]['close'] = '20:30';//sun
$wppizza_options['openingtimes']['opening_times_standard'][1]['close'] = '21:00';//mon
$wppizza_options['openingtimes']['opening_times_standard'][2]['close'] = '21:00';//tue
$wppizza_options['openingtimes']['opening_times_standard'][3]['close'] = '21:00';//wed
$wppizza_options['openingtimes']['opening_times_standard'][4]['close'] = '21:00';//thu
$wppizza_options['openingtimes']['opening_times_standard'][5]['close'] = '21:00';//fri
$wppizza_options['openingtimes']['opening_times_standard'][6]['close'] = '21:00';//sat
}	
return $wppizza_options;
}

not tested as such but should work

because you must also enable them in wppizza->templates