Hi, David. I can’t help but believe that you are already very familiar with table basics and that you are still leading up to a more complex layout question. Nevertheless…
This post demonstrates exactly what @SamA74 said.
If you want your articles aligned horizontally, then you have to layout your page so they are horizontally aligned in rows, not columns. Within the outermost table container, you can nest a table with x-number of columns and include as many rows as needed to hold that content, or you can stack individual tables with one row and x-number of cells in the row. Generally, I would recommend changing table models when the number of columns needed changes or the structure of the columns changes (different widths).
That top image in the screenshot is just a placeholder to say that there is a full width table at the top of the stack.
The next table contains two rows with three columns each. You can add as many rows of three columns within that one table as needed to hold your content. I would like to assume that your copywriter can place articles of apporximately equal length in cells in the same row so wasted white space is minimized, but it totally isn’t necessary.
Change tables when a new pattern of columns is needed.
You can separate the tables with margins, if more space between them is desired.
You DO have to be aware of the length of words and URLs especially in the three column layout. They will not wrap. Instead they will stretch the table’s width and it will look weirdly out of balance. Either reduce the font size or curtail the visible portion of URLs, or maybe there is another technique that will work with long words and URLs in e-mail. Dunno.
Screenshot then HTML.
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>table template</title>
<!--
https://www.sitepoint.com/community/t/tables-and-html-newsletters-are-baking-my-noodle/243667/2
Nightwing
-->
<style>
/* TEMPORARY. visualize inner tables and cells */
table {border:1px solid #aaa;}
table table td {outline:1px solid #aaa;}
</style>
</head>
<body>
<table width="600" align="center" border="0" cellpadding="0" cellspacing="0">
<tr>
<td>
<!-- 1 column -->
<table width="100%" border="0" cellpadding="0" cellspacing="12">
<tr>
<td valign="top">
<img src="http://placehold.it/576x100/" width="576" height="100" alt="" style="display:block;">
</td>
</tr>
</table>
<!-- change table models when number of colums changes -->
<!-- 3 columns -->
<table width="100%" border="0" cellpadding="0" cellspacing="12">
<tr>
<td width="33.33%" valign="top">
<img src="http://placehold.it/184x174/" width="184" height="174" alt="" style="display:block;">
<h1 style="font-size:1.25em;font-family:Arial,sans-serif;">Congratulations to the Winners!</h1>
<h2 style="font-size:1.0em;font-family:Arial,sans-serif;">York Culture Awards 2016</h2>
<p style="font-size:1.0em;font-family:Arial,sans-serif;color:#000;margin-top:8px;margin-bottom:8px;">Actor Mark Addy joined Presenter, BBC Radio York’s Georgey Spanswick, to celebrate.... See who scooped an award >>></p>
</td>
<td width="33.33%" valign="top">
<img src="http://placehold.it/184x174/" width="184" height="174" alt="" style="display:block;">
<h1 style="font-size:1.25em;font-family:Arial,sans-serif">We’re Going Dutch!</h1>
<h2 style="font-size:1.0em;font-family:Arial,sans-serif">At Vakantiebeurs<br>11 – 15 January</h2>
<p style="font-size:1.0em;font-family:Arial,sans-serif;color:#000;margin-top:8px;margin-bottom:8px;">Vakantiebeurs is the biggest consumer and trade show in the Netherlands and we’ll be there next month flying the flag for York. Get involved in our new Dutch campaign>>></p>
</td>
<td width="33.33%" valign="top">
<img src="http://placehold.it/184x174/" width="184" height="174" alt="" style="display:block;">
<h1 style="font-size:1.25em;font-family:Arial,sans-serif">Be Bang up to Date…</h1>
<h2 style="font-size:1.0em;font-family:Arial,sans-serif">…On all Things Christmas…</h2>
<p style="font-size:1.0em;font-family:Arial,sans-serif;color:#000;margin-top:8px;margin-bottom:8px;">Get your free copies of the Christmas Festival Guide. Please link your website to <span style="display:block;font-size:.875em;"><a href="www.visityork.org/Christmas">www.visityork.org/Christmas</a></span></p>
</td>
</tr>
<tr>
<td width="33.33%" valign="top">
<img src="http://placehold.it/184x174/" width="184" height="174" alt="" style="display:block;">
<h1 style="font-size:1.25em;font-family:Arial,sans-serif">Townhouse Mouse Award</h1>
<h2 style="font-size:1.0em;font-family:Arial,sans-serif">Historic Houses Association Award</h2>
<p style="font-size:1.0em;font-family:Arial,sans-serif;color:#000;margin-top:8px;margin-bottom:8px;">HUGE congrats to Fairfax House for scooping the 2016 Frances Garnham Award for its innovative educational work. Read all about the Townhouse Mouse and his fellow mouselings>>></p>
</td>
<td width="33.33%" valign="top">
<img src="http://placehold.it/184x174/" width="184" height="174" alt="" style="display:block;">
<h1 style="font-size:1.25em;font-family:Arial,sans-serif">Indie York</h1>
<h2 style="font-size:1.0em;font-family:Arial,sans-serif">Puts small businesses on the map</h2>
<p style="font-size:1.0em;font-family:Arial,sans-serif;color:#000;margin-top:8px;margin-bottom:8px;">The York Independent Business Association is putting Indie York on the map; this new pilot aims to boost York’s independent retailers and trade. Get involved >>> www.indieyork.co.uk </p>
</td>
<td width="33.33%" valign="top">
<img src="http://placehold.it/184x174/" width="184" height="174" alt="" style="display:block;">
<h1 style="font-size:1.25em;font-family:Arial,sans-serif">Free Masterclass for HR Professionals - Tackling the Thieves of Time </h1>
<h2 style="font-size:1.0em;font-family:Arial,sans-serif">Grays Court Hotel – 9 December </h2>
<p style="font-size:1.0em;font-family:Arial,sans-serif;color:#000;margin-top:8px;margin-bottom:8px;">Love or hate it, email can take over our lives… Learn how to help your staff be more purposeful with their days. Book your free place on this unique masterclass >>></p>
</td>
</tr>
<!-- insert more rows as needed -->
</table>
<!-- change table models when number of colums changes -->
<table width="100%" border="0" cellpadding="0" cellspacing="12">
<tr>
<td width="50%" valign="top">
<img src="http://placehold.it/282x200/" width="282" height="200" alt="" style="display:block;">
<h1 style="font-size:1.25em;font-family:Arial,sans-serif">Residents Festival</h1>
<h2 style="font-size:1.0em;font-family:Arial,sans-serif">28 and 29 January – Deadline for taking part – NOW!</h2>
<p style="font-size:1.0em;font-family:Arial,sans-serif;color:#000;margin-top:8px;margin-bottom:8px;">Don’t miss this free opportunity to get visitors through your door! 20,000 residents take part in our annual York Residents Festival, sponsored by First. Email sue.frumin@makeityork.com </p>
</td>
<td width="50%" valign="top">
<img src="http://placehold.it/282x200/" width="282" height="200" alt="" style="display:block;">
<h1 style="font-size:1.25em;font-family:Arial,sans-serif">Intrigued by Google Analytics?</h1>
<h2 style="font-size:1.0em;font-family:Arial,sans-serif"></h2>
<p style="font-size:1.0em;font-family:Arial,sans-serif;color:#000;margin-top:8px;margin-bottom:8px;">Join this half day course on getting to grips with Google Analytics, so you can fully utilise this tool to benefit your business. Book here for Thursday 26 Jan 2017 >>> Book here fro Thursday 23 Feb 2017 >>></p>
</td>
</tr>
</table>
</td>
</tr>
</table>
</body>
</html>
Sorry, but I cannot relate to the code written in MS Office. (The only Microsoft products that I own are O/Ss.) Is that a MailChimp requirement?