wp_mail only sends emails to gmail

Question

wp_mail only sends emails to gmail and i receive emails only on gmail inbox but in dedicated servers couldnt send recieve anything even as spam followed data works well only to gmail

        add_filter( 'wp_mail_content_type', array( $this, 'set_html_mail_content_type' ) );
       
        $to = myacc@gmail.com;

        $subject = 'test';
        
        wp_mail( $to, $subject, 'body');

        remove_filter( 'wp_mail_content_type', array( $this, 'set_html_mail_content_type' ) );

Answer 1

Welcome to WPD stack exchange.

as I am see its look like sometimes we have forgot to add some basic need and function not working properly.

Please try with header parameter:

$headers[] = 'Content-type: text/plain; charset=utf-8';  
$headers[] = 'From:' . "testing@gmail.com";

Also, you can use Easy WP SMTP and enable debugging and/or set that up to use SMTP. If something like GMail works then you'll know it is a server setting and not this code.