settings/templates/email.new_user.php
<table cellspacing="0" cellpadding="0" border="0" width="100%">
<tr><td>
<table cellspacing="0" cellpadding="0" border="0" width="600px">
<tr>
<td bgcolor="<?php p($theme->getMailHeaderColor());?>" width="20px"> </td>
<td bgcolor="<?php p($theme->getMailHeaderColor());?>">
<img src="<?php p(\OC::$server->getURLGenerator()->getAbsoluteURL(image_path('', 'logo-mail.gif'))); ?>" alt="<?php p($theme->getName()); ?>"/>
</td>
</tr>
<tr><td colspan="2"> </td></tr>
<tr>
<td width="20px"> </td>
<td style="font-weight:normal; font-size:0.8em; line-height:1.2em; font-family:verdana,'arial',sans;">
<?php
print_unescaped($l->t('Hey there,<br><br>just letting you know that you now have an %s account.<br><br>Your username: %s<br>Please set the password by accessing it: <a href="%s">Here</a><br><br>', [$theme->getName(), $_['username'], $_['url']]));
// TRANSLATORS term at the end of a mail
p($l->t('Cheers!'));
?>
</td>
</tr>
<tr><td colspan="2"> </td></tr>
<tr>
<td width="20px"> </td>
<td style="font-weight:normal; font-size:0.8em; line-height:1.2em; font-family:verdana,'arial',sans;">--<br>
<?php p($theme->getName()); ?> -
<?php p($theme->getSlogan()); ?>
<br><a href="<?php p($theme->getBaseUrl()); ?>"><?php p($theme->getBaseUrl());?></a>
</td>
</tr>
<tr>
<td colspan="2"> </td>
</tr>
</table>
</td></tr>
</table>