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Zimbra Web Client Sign In Test Results Mobile Usability: 100/100 Mobile Speed: 90/100

Quick overview:
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking CSS resources. This causes a delay in rendering your page.
Optimize CSS Delivery of the following:,login,zhtml,skin.css?skin=harmony&v=141103155051
Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 7KiB (61% reduction).
Compressing could save 7KiB (61% reduction).
Minify HTML
Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.
Minify HTML for the following resources to reduce their size by 2.5KiB (23% reduction).
Minifying could save 2.5KiB (23% reduction).

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