I worked on creating an HTML email, and for some reason it looks great in MailChimp / Chrome / GMail, but in Outlook the columns are stretched and look awful (see screenshots). I am not very good at HTML, and I tried to change several parameters of maximum width to 600 pixels instead of 100% without success.
I would like the letter to always be 600 pixels wide.
Any help is appreciated.

^ What it looks like in Chrome / Gmail

^ What it looks like in Outlook (the upper blue part is 600 pixels, and the rest are stretched).
Here is the HTML code I'm working with:
<style type="text/css"> #outlook a{ padding:0; } body{ width:600 !important; } .ReadMsgBody{ width:100%; } .ExternalClass{ width:100%; } body{ -webkit-text-size-adjust:none; } body{ margin:0; padding:0; } img{ height:auto; line-height:100%; outline:none; text-decoration:none; } #backgroundTable{ height:100% !important; margin:0; padding:0; width:100% !important; } body,#backgroundTable{ background-color:#314A66; } h1,.h1{ color:#FFFFFF; display:block; font-family:Verdana; font-size:26px; font-weight:bold; line-height:100%; margin-top:0; margin-right:0; margin-bottom:10px; margin-left:0; text-align:center; } h2,.h2{ color:#0E385F; display:block; font-family:Verdana; font-size:22px; font-weight:bold; line-height:100%; margin-top:0; margin-right:0; margin-bottom:10px; margin-left:0; text-align:left; } h3,.h3{ color:#0E385F; display:block; font-family:Verdana; font-size:20px; font-weight:bold; line-height:100%; margin-top:0; margin-right:0; margin-bottom:10px; margin-left:0; text-align:left; } h4,.h4{ color:#0E385F; display:block; font-family:Verdana; font-size:12px; font-weight:bold; line-height:100%; margin-top:0; margin-right:0; margin-bottom:10px; margin-left:0; text-align:left; } #templatePreheader{ background-color:#36C0CC; } .preheaderContent div{ color:#CCCCCC; font-family:Lucida Sans,Lucida; font-size:10px; line-height:110%; text-align:left; } .preheaderContent div a:link,.preheaderContent div a:visited,.preheaderContent div a .yshortcuts { color:#EEEEEE; font-weight:normal; text-decoration:underline; } #templateHeader{ background-color:#36C0CC; border-bottom:0; } .headerContent div{ color:#FFFFFF; font-family:Verdana; font-size:14px; font-weight:normal; line-height:100%; padding-top:20px; padding-right:20px; padding-bottom:20px; padding-left:10px; text-align:left; vertical-align:top; } .headerContent div a:link,.headerContent div a:visited,.headerContent div a .yshortcuts { color:#336699; font-weight:normal; text-decoration:underline; } .headerContent div img{ height:auto; max-width:600px; } #templateContainer,.bodyContent{ background-color:#FFFFFF; } #templateBody{ border:0px none #10263F; } .bodyContent div,#social div{ color:#505050; font-family:Verdana; font-size:12px; line-height:150%; } .bodyContent div{ text-align:justify; } .bodyContent div a:link,.bodyContent div a:visited,.bodyContent div a .yshortcuts ,#social div a:link,#social div a:visited{ color:#336699; font-weight:normal; text-decoration:none; } .bodyContent div img{ display:inline; height:auto; max-width:360px; } #social{ padding-top:20px; padding-right:20px; padding-bottom:20px; padding-left:20px; } #social div{ text-align:center; } #social div img{ max-width:560px; } #templateSidebar{ background-color:#accb50; border-left:0px dotted; } .sidebarContent div{ color:#ffffff; font-family:Lucida Sans,Lucida; font-size:11px; line-height:150%; text-align:justify; } .sidebarContent div a:link,.sidebarContent div a:visited,.sidebarContent div a .yshortcuts { color:#336699; font-weight:normal; text-decoration:none; } .sidebarContent img{ display:inline; height:auto !important; margin-bottom:10px !important; } #templateFooter{ background-color:#36C0CC; border-top:2px solid #111111; } .footerContent div{ color:#CCCCCC; font-family:Verdana; font-size:10px; line-height:125%; text-align:left; } .footerContent div a:link,.footerContent div a:visited,.footerContent div a .yshortcuts { color:#EEEEEE; font-weight:normal; text-decoration:underline; } .footerContent img{ display:inline; } #utility{ background-color:#36C0CC; border:0; } #utility div{ text-align:center; } #monkeyRewards img{ max-width:190px; } body,#backgroundTable{ background-color:#ffffff; } h1,.h1{ color:#ffffff; text-align:left; font-family:Lucida Sans,Lucida; line-height:110%; } .footerContent div a:link,.footerContent div a:visited,.footerContent div a .yshortcuts{ color:#4D4C4C; } .bodyContent div,#social div{ font-family:Lucida Sans,Lucida; font-size:11px; color:#545454; line-height:150%; } #templateContainer,.bodyContent{ background-color:#E2E2E2; } </style></head> <body leftmargin="0" marginwidth="0" topmargin="0" marginheight="0" offset="0" style="-webkit-text-size-adjust: none;margin: 0;padding: 0;background-color: #ffffff;width: 600 !important;"> <center> <table border="0" cellpadding="0" cellspacing="0" height="100%" width="100%" id="backgroundTable" style="margin: 0;padding: 0;background-color: #ffffff;height: 100% !important;width: 100% !important;"> <tr> <td align="center" valign="top"> <table border="0" cellpadding="10" cellspacing="0" width="600" id="templatePreheader" style="background-color: #36C0CC;"> <tr> <td valign="top" class="preheaderContent"> <table border="0" cellpadding="10" cellspacing="0" width="100%"> <tr> <td valign="top"> <div style="color: #CCCCCC;font-family: Lucida Sans,Lucida;font-size: 10px;line-height: 110%;text-align: left;"><a href="www.scandit.com" target="_blank" style="color: #EEEEEE;font-weight: normal;text-decoration: underline;"><img align="left" alt="" height="57" src="http://gallery.mailchimp.com/3c1958ec76b5e1d93c32cf088/files/scandit_logo_white_wtag2.png" style="width: 147px;height: 57px;float: left;border-width: 0px;border-style: solid;line-height: 100%;outline: none;text-decoration: none;" width="147"></a> </div> </td> <td valign="top" width="190"> <div style="color: #CCCCCC;font-family: Lucida Sans,Lucida;font-size: 10px;line-height: 110%;text-align: left;"> Is this email not displaying correctly?<br><a href="*|ARCHIVE|*" target="_blank" style="color: #EEEEEE;font-weight: normal;text-decoration: underline;">View it in your browser</a>. </div> </td> </tr> </table> </td> </tr> </table> <table border="0" cellpadding="0" cellspacing="0" width="600" id="templateContainer" style="background-color: #E2E2E2;"> <tr> <td align="center" valign="top"> <table border="0" cellpadding="0" cellspacing="0" width="600" id="templateHeader" style="background-color: #36C0CC;border-bottom: 0;"> <tr> <td class="headerContent"> <div style="color: #FFFFFF;font-family: Verdana;font-size: 14px;font-weight: normal;line-height: 100%;padding-top: 20px;padding-right: 20px;padding-bottom: 20px;padding-left: 10px;text-align: left;vertical-align: top;"><span style="font-size:24px;"><strong> Howdy!</strong><br></span></div> <div id="_com_1" uage="JavaScript" style="color: #FFFFFF;font-family: Lucida Sans,Lucida;font-size: 14px;line-height: 150%;text-align: justify; padding-left: 20px;"> Welcome!<br><br> <br></div> </td> </tr> </table> </td> </tr> <tr> <td align="center" valign="top"> <table border="0" cellpadding="0" cellspacing="0" width="600" id="templateBody" style="border: 0px none #10263F;"> <tr> <td valign="top"> <table border="0" cellpadding="0" cellspacing="0"> <tr> <td valign="top" class="bodyContent" style="background-color: #E2E2E2;"> <table border="0" cellpadding="20" cellspacing="0" width="100%"> <tr> <td valign="top"> <div style="color: #545454;font-family: Lucida Sans,Lucida;font-size: 11px;line-height: 150%;text-align: justify;"><div style="text-align: left;color: #545454;font-family: Lucida Sans,Lucida;font-size: 11px;line-height: 150%;"> <div style="color: #545454;font-family: Lucida Sans,Lucida;font-size: 11px;line-height: 150%;text-align: justify;"> <div style="color: #545454;font-family: Lucida Sans,Lucida;font-size: 11px;line-height: 150%;text-align: justify;"> <strong>Features</strong><br> <hr> </div> <ul> </ul> </div> <hr> <br> <center><FORM METHOD="LINK" ACTION="https://SAMPLE TEXT SAMPLE TEXT SAMPLE TEXT"> <INPUT TYPE="submit" VALUE="SAMPLE TEXT SAMPLE TEXT SAMPLE TEXT"> </FORM></center> <br> <br> SAMPLE TEXT <br> </div> </div> </div> </div> </td> </tr> </table> </td> </tr> </table> </td> <td valign="top" width="300" id="templateSidebar" style="background-color: #accb50;border-left: 0px dotted;"> <table border="0" cellpadding="0" cellspacing="0" width="00"> <tr> <td valign="top" class="sidebarContent" style="padding-bottom:20px;"> <table border="0" cellpadding="20" cellspacing="0" width="100%"> <tr> <td valign="top" style="padding-bottom:0;"> <div style="color: #ffffff;font-family: Lucida Sans,Lucida;font-size: 11px;line-height: 150%;text-align: justify;"><h4 class="h4" style="color: #0E385F;display: block;font-family: Verdana;font-size: 12px;font-weight: bold;line-height: 100%;margin-top: 0;margin-right: 0;margin-bottom: 10px;margin-left: 0;text-align: left;"> <span style="color:#fff0f5;">Getting Started</span></h4> <hr> <div style="text-align: left;color: #ffffff;font-family: Lucida Sans,Lucida;font-size: 11px;line-height: 150%;"> <strong><span style="font-size:12px;"><span style="color: rgb(255, 240, 245); "> <ul> <li>Barcode Scanner SDK Documentation <ul> </ul> <br> SAMPLE TEXTSAMPLE TEXTSAMPLE TEXT <a href="" target="_blank" style="color: #336699;font-weight: normal;text-decoration: none;">FAQs</a> or <a href="mailto:SAMPLETEXT.com" target="_blank" style="color: #336699;font-weight: normal;text-decoration: 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!important;line-height: 100%;outline: none;text-decoration: none;display: inline;margin-bottom: 10px !important;"> </td> <td align="left" valign="top"> <div style="color: #ffffff;font-family: Lucida Sans,Lucida;font-size: 11px;line-height: 150%;text-align: justify;"><a href="http://www.twitter.com/scandit" target="_blank" style="color: #336699;font-weight: normal;text-decoration: none;">Follow us on Twitter</a> </div> </td> </tr> <tr mc:hideable="hideable_3" mchideable="hideable_3"> <td align="left" valign="middle" width="16"> <img src="http://gallery.mailchimp.com/27aac8a65e64c994c4416d6b8/images/sfs_icon_rss.1.png" style="margin: 0 !important;height: auto !important;line-height: 100%;outline: none;text-decoration: none;display: inline;margin-bottom: 10px !important;"> </td> <td align="left" valign="top"> <div style="color: #ffffff;font-family: Lucida Sans,Lucida;font-size: 11px;line-height: 150%;text-align: justify;"><a href="http://www.scandit.com/blog" target="_blank" style="color: #336699;font-weight: normal;text-decoration: none;">Read our blog</a> </div> </td> </tr> <tr mc:hideable="hideable_4" mchideable="hideable_4"> <td align="left" valign="middle" width="16"> <img src="http://gallery.mailchimp.com/653153ae841fd11de66ad181a/images/sfs_icon_forward.png" style="margin: 0 !important;height: auto !important;line-height: 100%;outline: none;text-decoration: none;display: inline;margin-bottom: 10px !important;"> </td> <td align="left" valign="top"> <div style="color: #ffffff;font-family: Lucida Sans,Lucida;font-size: 11px;line-height: 150%;text-align: justify;"><div style="text-align: left;color: #ffffff;font-family: Lucida Sans,Lucida;font-size: 11px;line-height: 150%;"> <a href="*|FORWARD|*" style="color: #336699;font-weight: normal;text-decoration: none;">Sign up for our newsletter</a></div> </div> </td> </tr> </table> </td> </tr> </table> </td> </tr> </table> </td> </tr> <tr> <td colspan="2" valign="middle" id="social" style="padding-top: 20px;padding-right: 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#36C0CC;border-top: 2px solid #111111;"> <tr> <td valign="top" class="footerContent"> <table border="0" cellpadding="10" cellspacing="0" width="100%"> <tr> <td valign="top" width="350"> <div style="color: #CCCCCC;font-family: Verdana;font-size: 10px;line-height: 125%;text-align: left;"> <em>Copyright © *|CURRENT_YEAR|* *|LIST:COMPANY|*, All rights reserved.</em> <br> *|IFNOT:ARCHIVE_PAGE|* *|LIST:DESCRIPTION|* <br> <strong>Our mailing address is:</strong> <br> *|HTML:LIST_ADDRESS_HTML|* <br> *|END:IF|* </div> </td> <td valign="top" width="190" id="monkeyRewards"> <div style="color: #CCCCCC;font-family: Verdana;font-size: 10px;line-height: 125%;text-align: left;"> *|IF:REWARDS|* *|HTML:REWARDS|* *|END:IF|* </div> </td> </tr> <tr> <td colspan="2" valign="middle" id="utility" style="background-color: #36C0CC;border: 0;"> <div style="color: #CCCCCC;font-family: Verdana;font-size: 10px;line-height: 125%;text-align: center;"> <a href="*|ARCHIVE|*" style="color: #4D4C4C;font-weight: normal;text-decoration: underline;">view email in browser</a>*|END:IF|* </div> </td> </tr> </table> </td> </tr> </table> </td> </tr> </table> <br> </td> </tr> </table> </center> </body> </html> </body> </html>