Código do modelo de email
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,minimum-scale=1">
<title>Hotel Reservation</title>
</head>
<body style="background-color:#F5F6F8;font-family:-apple-system, BlinkMacSystemFont, 'segoe ui', roboto, oxygen, ubuntu, cantarell, 'fira sans', 'droid sans', 'helvetica neue', Arial, sans-serif;box-sizing:border-box;font-size:16px;">
<div style="background-color:#fff;margin:30px;box-sizing:border-box;font-size:16px;">
<h1 style="padding:40px;box-sizing:border-box;font-size:24px;color:#ffffff;background-color:#cb5f51;margin:0;">Hotel Reservation</h1>
<p style="padding:40px 40px 20px 40px;margin:0;box-sizing:border-box;font-size:16px;">A guest has booked a reservation for <b><?=$arrival?></b> and will departure on <b><?=$departure?></b>.</p>
<h2 style="padding:20px 40px;margin:0;color:#394453;box-sizing:border-box;">Guest Details</h2>
<div style="box-sizing:border-box;padding:0 40px 20px;">
<table style="border-collapse:collapse;width:100%;">
<tbody>
<tr>
<td style="padding:15px 0;text-decoration:underline;">Email</td>
<td style="text-align:right;"><?=$email?></td>
</tr>
<tr>
<td style="padding:15px 0;text-decoration:underline;">Name</td>
<td style="text-align:right;"><?=$first_name?> <?=$last_name?></td>
</tr>
<tr>
<td style="padding:15px 0;text-decoration:underline;">Phone</td>
<td style="text-align:right;"><?=$phone?></td>
</tr>
<tr>
<td style="padding:15px 0;text-decoration:underline;">Adults</td>
<td style="text-align:right;"><?=$adults?></td>
</tr>
<tr>
<td style="padding:15px 0;text-decoration:underline;">Children</td>
<td style="text-align:right;"><?=$children?></td>
</tr>
<tr>
<td style="padding:15px 0;text-decoration:underline;">Room Preference</td>
<td style="text-align:right;"><?=$room_pref?></td>
</tr>
</tbody>
</table>
</div>
</div>
</body>
</html>
Dull Dugong