Adding wp_mail_from as default from addr support?

Hello! I’ve just tried this check email plugin on a WP I admin and found out that setting the from email to the site’s wp_mail_from email works while having the from email set to something not on the same domain will fail. I have modified my site’s copy of Check Email to default to the wp_mail_from and then set it to either the current user email or the custom from email field if that’s missing.

For reference, directly from the wp_mail() function (starting line 345) the following code can be copied to get the default from email and name, even if it’s set via theme’s functions.php or another plugin:

$from_email = apply_filters( 'wp_mail_from', $from_email );
// ...
$from_name = apply_filters( 'wp_mail_from_name', $from_name );

I changed the checkemail() and checkemail_send() functions on mine to accommodate this.