Editing Microsoft Outlook (section)

=== Support of CSS properties and HTML attributes ===
Outlook for Windows has very limited CSS support compared to various other e-mail clients. Neither [[Cascading Style Sheets#CSS 1|CSS1 (1996)]] nor [[Cascading Style Sheets#CSS 2|CSS2 (1998)]] specifications are fully implemented and many CSS properties can only to be used with certain HTML elements for the desired effect.<ref name="campaignmonitor">{{cite web|url=http://www.campaignmonitor.com/css/|title=CSS Support Guide for Email Clients – Campaign Monitor|access-date=September 6, 2012|archive-date=January 15, 2021|archive-url=https://web.archive.org/web/20210115055555/https://www.campaignmonitor.com/css/|url-status=live}}</ref> Some HTML attributes help achieve proper rendering of e-mails in Outlook, but most of these attributes are already deprecated in the [[HTML#HTML version timeline|HTML 4.0 specifications (1997)]].<ref>{{cite web|url=http://www.w3.org/TR/1998/REC-html40-19980424/|title=HTML 4.0 Specification|access-date=September 6, 2012|archive-date=July 27, 2008|archive-url=https://web.archive.org/web/20080727143129/http://www.w3.org/TR/1998/REC-html40-19980424/|url-status=live}}</ref> In order to achieve the best compatibility with Outlook, most HTML e-mails are created using multiple boxed tables, as the table element and its sub-elements support the width and height property in Outlook. No improvements have been made towards a more standards-compliant email client since the release of Outlook 2007.<ref>{{cite web |url=https://www.campaignmonitor.com/blog/post/3769/a-designers-guide-to-outlook-2013|title=A designer's guide to Outlook 2013 and Office 365 |access-date=July 22, 2014|url-status=dead|archive-date=November 28, 2014|archive-url=https://web.archive.org/web/20141128231246/https://www.campaignmonitor.com/blog/post/3769/a-designers-guide-to-outlook-2013}}</ref>