ZipMail for Microsoft Outlook Web App / OWA

Volume Optimization, Acceleration and Cost Reduction for Microsoft Outlook Web Access

Network Acceleration

Smaller MS Outlook emails
Faster network

Volume Reduction

You may not need all these servers.
Check our optimization solutions before to buy new ones.

Performance Improvement

Smaller email stores
Faster Exchange servers

Cost Reduction

Reduced network and storage needs
Lower costs

Reduce your Microsoft Exchange network bandwidth and storage needs by 50% or even more!

Each time a user attaches files in Microsoft OWA, ZipMail automatically and transparently reduces the size of the attached files by performing on-the-fly Native XML File Optimization (for all Microsoft Office XML files like DOCX, PPTX, XLSX, VSDX etc.) and Native Image File Optimization (for JPG, GIF, PNG, BMP, EMF, WMF, TIF and TIFF files).
Zip compression
can be used automatically or on demand with the other file types.

Since attached files are responsible for up to 95% of your email traffic (and thus storage), ZipMail reduces your needs for Microsoft Exchange / OWA related network bandwidth and disk space by 50% (or even more) while remaining fully transparent to your Microsoft Outlook Web App users, and to the recipients of their emails as well, even if they do not have ZipMail installed.

Imagine your global Microsoft Exchange organization with Microsoft OWA users generating 2 times less email traffic...

Boost the performance of your on-premise or cloud-based Microsoft Exchange organization!

The performance boost delivered at the source by ZipMail applies to your Microsoft OWA users, your MS Exchange servers, your LANs and WANs (even when equipped with network compression appliances), as well as to all the processes having to handle emails, like routing, indexing, searching, backup and restore operations, archiving etc.

The reason is simple:
Whatever you have to do with emails is faster with smaller emails.

ZipMail for Microsoft Outlook Web App and ZipMail for Microsoft Outlook are considered to be the simpler and most powerful solutions for on-premise and cloud-based Microsoft Exchange organizations facing network saturation and network performance issues.

Improve Microsoft OWA Usage!

One-click attached file PDF conversion and one-click attached file encryption enable, among many other value-add ZipMail features, to extend Microsoft OWA usage and to improve Microsoft OWA user efficiency.
See how it works

Videos of ZipMail Optimization, Compression, PDF Conversion and Encryption Features at Work:

Automatic and transparent on-the-fly native XML volume optimization for Microsoft Outlook Office 2007, 2010, 2013 and 2016 XML attached files (DOCX, PPTX, XLSX, VSDX... files) and Open Office XML attached files (ODT, ODP, ODS files). +

Automatic and transparent on-the-fly native volume optimization for Microsoft Outlook attached picture and image files (JPG, GIF, PNG, BMP, EMF, WMF, TIF, TIFF). Optional policies to resize largest images to specific dimensions, for instance HD - 1920 x 1080 pixels. +
Automatic and transparent on-the-fly Zip compression and decompression for Microsoft Outlook attached files. +
On-demand single-click on-the-fly PDF conversion for Microsoft Outlook attached files. The resulting PDF files are optimized for high quality rendering and low size in KB. +
Standard Zip and AES-256 Zip password-based encryption and decryption for Microsoft Outlook attached files. +

Microsoft OWA attached files once optimized by ZipMail:

Typical residual sizes of Microsoft OWA attached files processed by ZipMail (in percent of their original size):
  • XML files (DOCX, PPTX, XLSX etc.) 49% 49%
  • Image files (JPG, PNG, BMP etc.) 32% 32%
  • Other files 43% 43%
  • Files converted to PDF 44% 44%

Cascading Benefits:

ZipMail reduces, at the source, the "damages" resulting of having hundreds to hundreds of thousands of users, like at our largest customers, attaching files of all sizes (often large) to their Microsoft Outlook Web App emails. ZipMail optimizes (automatically and transparently) the attached files and pasted images at the time they are selected to be attached / pasted by the users. By doing so, ZipMail drastically reduces the size of all Microsoft OWA attached files before they even reach the emails being edited, and without requiring any specific action from the users! Since most of your Microsoft OWA-Exchange email traffic is made of attachments, the volume reduction effect on your global messaging traffic is immediate.


Microsoft OWA attached files and pasted images in percentage of your email traffic and storage

ZipMail for OWA is automatic and Transparent.
It starts delivering all the benefits listed above as soon as it is installed.
ZipMail for Microsoft Outlook Web App is fully automatic and 100% transparent. Microsoft OWA users have no special actions to take in order to use ZipMail, no user education is required. This means that as soon as ZipMail is installed, it starts reducing the volume of the email traffic generated by each individual Microsoft OWA user and begins delivering the benefits listed above.
ZipMail saved us literally dozens of terabytes in the last years, reducing our needs for Microsoft Exchange related network bandwidth and storage by more than 50%!

More details on:

Network bandwidth savings…

Storage savings…

With its new native optimization features for XML files (DOCX, PPTX and XLSX files) and picture files (JPG, GIF, BMP, PNG, TIF, TIFF, EMF and WMF files), ZipMail delivers better volume reduction ratios than ever.

And this, with a 100% transparency for the recipients, since the optimized attached files remain in their original format. Brilliant!


XML File Native Optimization…

Image File Native Optimization…

Example of files before and after optimization:

Image files…

MS Office files…

Because in many cases, it is better to send non-easily modifiable PDF files rather than MS Office documents, the Instant ZipMail one-click PDF conversion of the files being attached to MS Outlook emails is a great feature, available exactly when the users need it.

Plus, most often, the size of the resulting PDF files is by far smaller than the size of the original MS Office files, and the PDF file rendering quality is always excellent.


PDF Conversion…

The optional attached file password-based encryption, (including the support of the strong Zip-AES 256 encryption), is a key ZipMail feature for us when sending strictly confidential documents by email to our customers.

The very good point here is that the recipients of the password-protected encrypted attached files do not need ZipMail to open them.


Password-Based Encryption…


Our other optimization solutions for Microsoft messaging and collaboration platforms:

Our software offering includes a complete portfolio of optimization solutions for the following Microsoft messaging and collaboration platforms:
Microsoft Outlook
Microsoft Outlook Web App
Microsoft Exchange
Microsoft Skype for Business
Microsoft OneDrive
Microsoft SharePoint
Act Now!

Optimization-related questions?

Questions about:
  • Our optimization solutions?
  • SharePoint performance problems?
  • Email or IM volume or performance issues?
  • Migrating to the cloud and needing to anticipate network bandwidth issues?
  • Looking for an optimization solution you did not find on our web site?

Fully functional evaluation versions

Start evaluating our client and server optimization solutions for:
  • Microsoft Outlook, OWA, Exchange, Lync / Skype for Business and SharePoint
  • IBM Notes, iNotes, Domino, Connections and Verse
  • Google Gmail,, Yahoo Mail and other web mails

Curious to have a look at image files natively optimized by our solutions?

Before evaluating our optimization solutions, you’d like to look at some image file samples, before and after optimization, check the volume reduction ratios, display original and optimized pictures side by side at screen or even print them.

Curious to have a look at MS Office XML files natively optimized by our solutions?

Before evaluating our optimization solutions, you’d like to look at some MS Office XML file samples, before and after optimization, check the volume reduction ratios, display original and optimized DOCX, PPTX etc. files side by side at screen or even print them.

Let's stay in touch!

Would you be one of our customers or just starting an evaluation of our optimization solutions, or just thinking about using them for future projects, we can stay in touch through our newsletters.

Needing offline reading material?

  • PDF product flyers
  • White Papers
  • PowerPoint presentations
  • Video demo
© 1995-2024 MK Net.Work
Examples of natively optimized files