Mirapoint and Critical Path to Merge

Combined Company Creates a World Leader in Messaging and Security Solutions

SUNNYVALE, California & DUBLIN, October 20, 2010 - Mirapoint Software Inc., the secure enterprise messaging
experts, and Critical Path, Inc., a leading provider of messaging software
and services, today announced that they have entered into a definitive
agreement to merge.

The combination advances both companies' strategies of
delivering world class messaging, security and archiving solutions to leading
enterprises and service providers around the world.

"This merger brings immediate new value for Mirapoint's
enterprise and service provider customers," said Jeff Witous, CEO, Mirapoint.
"Mirapoint has achieved recognition as a world leader in providing integrated
email, security and archiving solutions in the convenience of an appliance.
We are delighted to now have the opportunity to combine that expertise with
Critical Path."

"This merger enriches our messaging and security offerings for
our combined customers around the world," commented Critical Path CEO Mark
Palomba. "We can now offer an unparalleled breadth of solution options
ranging from turnkey appliances to highly customized solutions to software as
a service for both enterprises and service providers."

The transaction is expected to be completed within 30 days.
The combined company will operate under the name Critical Path Inc. with
primary operations in Sunnyvale, California and Dublin, Ireland. Mark Palomba
will serve as CEO with Jeff Witous serving as a strategic advisor to the
combined company.

About Mirapoint Software, Inc.

Founded in 1997, Mirapoint Software is the market leader in
appliance-based solutions for secure message networks in enterprise, service
provider, and education organizations, with more than 120 million mailboxes
served and secured worldwide. Customers use Mirapoint appliances to build the
messaging infrastructure that intelligently serves, secures, and manages
email. Mirapoint is headquartered in Sunnyvale, California, with offices
throughout North America, Europe, and Asia. For more information about
Mirapoint, visit its Web site at www.mirapoint.com.

About Critical Path, Inc.

Critical Path's Memova(R) suite of applications and services
are chosen by leading service providers and enterprises around the world to
enable millions of people to communicate, connect, share and organize while
providing industry-leading safety and assurance.

With offices around the globe, Critical Path supports
companies with their deployments of Memova solutions to drive revenue, boost
loyalty, streamline operations and reduce costs. More information is
available at www.criticalpath.net.

Note to Editors:

Critical Path, the Critical Path logo, Messages that Matter,
The World is Mobile, AppLink, Memova and the Memova logo are the trademarks
of Critical Path, Inc., registered in various jurisdictions. All other
trademarks are the property of their respective holders.

    Reporters, Editors - for additional information, contact:

    Critical Path, Inc.
    Nikki Gore
    Siren Marketing
    pr@criticalpath.net
    +1-416-602-3978

    Annette Leach
    Hotwire
    +44(0)207-608-2500
    criticalpath@hotwirepr.com

    Jay Shotwell
    Shotwell Public Relations
    +1-408-666-9200
    jay@shotwellpr.com

Reporters, Editors - for additional information, contact: Critical Path, Inc., Nikki Gore, Siren Marketing, pr at criticalpath.net, +1-416-602-3978; Annette Leach, Hotwire, +44(0)207-608-2500, criticalpath at hotwirepr.com; Mirapoint Software Inc., Lynn B. Johnson, Shotwell Public Relations, +1-413-320-9141