templates/email/register.html.twig
<!DOCTYPE html>
<html lang="en">
<body style="margin: 0;">
<table border="0" width="100%">
<tr>
<td>
<p>Welcome to Ultimate Warfare,</p>
</td>
</tr>
<tr>
<td>
<p>A game where you can recruit friends or strangers and have them fight alongside with you. Build the strongest army, buy the strongest weapons and conquer countries as a result of which your power becomes larger and allows you to dominate all those who oppose you!</p>
</td>
</tr>
<tr>
<td>
<p>Thank you for joining Ultimate Warfare we hope you enjoy your stay here and also hope that you have lots of fun playing the game and meeting new friends.</p>
</td>
</tr>
<tr>
<td>
<p>Username: {{ username }}</p>
</td>
</tr>
<tr>
<td style="text-align: center;"><a style="text-decoration: none" href="{{ url('User/Activation', {'token': token}) }}" target="_blank"><span style="color: white; background-color: #443311; display: inline-block; font-size: 16px; border-radius: 2px; text-align: center; height: 40px; line-height: 40px; width: 300px; margin: 0 auto;">Activate account</span></a></td>
</tr>
<tr>
<td>
<p>Please do not reply to these messages, they are created by an automatic device and replies will not be read.</p>
</td>
</tr>
<tr>
<td>
<p><a href="{{ url('Site/Homepage') }}">{{ url('Site/Homepage') }}</a></p>
</td>
</tr>
<tr>
<td>
<p>Thanks,</p>
</td>
</tr>
<tr>
<td>
<p>Frank</p>
</td>
</tr>
</table>
</body>
</html>