dexterenergen

to field:
xyz@hotmail.com

from field:
[dein-vorname]” “[dein-name] <xyz@hotmail.com>

additional headers:
Antworten an: [your-email]

message body:
Von: [dein-vorname] [dein-name] <[your-email]>
Betreff: [your-subject]

Nachrichtentext:
[your-message]

—
Diese E-Mail wurde via Kontaktformular von http://www.xyz.com gesendet

The additional settings filed in the plugin settings is empty. I also checked this post:
https://wordpress.org/support/topic/contact-form-7-229?replies=13

I have the following lines in my pluggable.php:

$content_type = apply_filters( ‘wp_mail_content_type’, $content_type );

$phpmailer->ContentType = $content_type;

// Set whether it’s plaintext, depending on $content_type
if ( ‘text/html’ == $content_type )
$phpmailer->IsHTML( true );

// If we don’t have a charset from the input headers
if ( !isset( $charset ) )
$charset = get_bloginfo( ‘charset’ );