Parameter -f mail@mydomain.it

Hi
I recently had your same problem with tophost and contact form
the problem is from tophost, it blocks every mail sent without that parameter.
I have resolved by hacking the wordpress core:
open wp-includes/class-phpmailer.php
search the line with
public $Sender = ”;
at about line 97, this is an empty string, put your email instead and save the changement.
now you will receive email, phpmailer automatically set the -f parameter when this string is not empty

would be great to put a hook filter to control the value of that variable because at every wordpress upgrade you have to rewrite your email

I just found a better solution, it doesn’t need to hack core

add_action('phpmailer_init', function($phpmailer){
	$phpmailer->Sender = $phpmailer->From;
});

place it in your functions.php 🙂