电子邮件地址从表格输入到表格

I am trying to have a form take the input of a username and have the @domain.com automatically added to the table. My code for the form is:

<th>Owner Emaill: *  <td><input type="text" name="email" value="<?php echo $email; ?>" />@informatica.com </td></tr>

and the table is:

echo '<td><a href="mailto:'.$row['email'].'">' . $row['email'].'</a></td>';

any help is greatly appreciated.

If you want to display it too:

echo '<td><a href="mailto:'.$row['email'].'@informatica.com">' . $row['email'].'@informatica.com</a></td>';