If you are looking to edit the content take a look at this plugin: https://www.ads-software.com/plugins/bnfw/
If you are looking to edit the from name and or email address you will need to create a child theme and add some or all of the following code to your functions.php in the child theme.
Note: Remember to change the YOUR NAME HERE and YOUR EMAIL ADDRESS HERE as appropriate in the below code.
function wpb_sender_email($from) {
// Get the site domain and get rid of www.
// see wp_mail() in pluggable.php
$sitename = strtolower($_SERVER['SERVER_NAME']);
if (substr($sitename, 0, 4) == 'www.') {
$sitename = substr($sitename, 4);
}
if ($from === 'wordpress@' . $sitename) {
$from = 'YOUR EMAIL ADDRESS HERE';
}
return $from;
}
// Function to change sender name
function wpb_sender_name($from_name) {
if ($from_name === 'WordPress') {
$from_name = 'YOUR NAME HERE';
}
return $from_name;
}
// Hooking up our functions to WordPress filters
add_filter( 'wp_mail_from', 'wpb_sender_email' );
add_filter( 'wp_mail_from_name', 'wpb_sender_name' );
More info on child themes:
https://developer.www.ads-software.com/themes/advanced-topics/child-themes/
Hope this helps.