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Since upgrading to 6.01 one of my users is having a problem with HTML attachments. Some companies that send him articles attach an HTML file to the e-mail containing links to the articles. When he opens this directly in Zimbra none of the images appear and all of the links are replaced with "about:blank".
I assume that this is an antispam/antivirus option but can't find where to turn it off.
Bugzilla
Wiki
Source
HTML attachments 
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