I have freshly installed ZCS no modifications whatsoever has been made. I dont know if it is a problem with Zimbra but the problem is it seems that all microsoft related document files such as .doc, .xls, .ppt are not properly associated when sent within zimbra to zimbra internal email accounts.
Kindly refer to the image attached. You'll see that there's no problem with PDF and JPEG zimbra find the associated icons . But with .doc, .xls, and .ppt you can see that the icon beside is a "?".
I am using IE8, I have microsoft office installed.
Release 5.0.18_GA_3011.UBUNTU8 UBUNTU8 FOSS edition