How to get the guest post author's name and email.

You must write it yourself.open content.php in your theme directory and find

<div class="entry-content entry-summary">
or
<div class="entry-content">
line.class names can be changable theme by theme , master word entry-content…

after this div , write what you need ; for example i need author’s name

<?php $author = get_post_meta(get_the_ID(),'author',true); ?>

<?php if ($author): ?>

<?php print "<br><font color = blue><b>Author name :</b></font> ".$author; ?>
<?php endif; ?>

explain : if custom field author exists ,then show it ,else shows nothing.