<?php

function ees_custom_password_reset($message, $key, $user_login, $user_data)
{
    $message = __('Someone has requested a password reset for the following account:') . "<br><br>\r\n\r\n";
    /* translators: %s: site name */
    $message .= sprintf(__('Site Name: %s'), get_bloginfo()) . "<br>\r\n\r\n";
    $message .= sprintf(__('Email Adress: %s'), $user_data->user_email) . "<br>\r\n\r\n";

    /* translators: %s: user login */
    $message .= sprintf(__('Username: %s'), $user_login) . "<br><br>\r\n\r\n";
    $message .= __('If this was a mistake, just ignore this email and nothing will happen.') . "<br><br>\r\n\r\n";
    $message .= __('To reset your password, visit the following address:') . "\r\n\r\n";
    $message .= '<a href="' . network_site_url("wp-login.php?action=rp&key=$key&login=" . rawurlencode($user_login), 'login') . "\">" . __('Reset your Password') . "</a>\r\n";

    return $message;
}

add_filter("retrieve_password_message", "ees_custom_password_reset", 99, 4);