Campbell, CA — June 9, 2008 — MailSite Software, Inc. announces MailSite
Fusion 9, the industry’s most compatible wired and wireless messaging
platform. MailSite Fusion 9 includes a new ActiveSync server with
DirectPush and can provide all of an organization’s email and collaboration
needs from a single server platform without the need for any additional

MailSite Fusion 9 pushes email, calendar and contacts over-the-air to every
major smartphone. This includes Apple’s new iPhone 2.0, Microsoft’s
Windows Mobile devices, RIM’s BlackBerry devices and other smartphones that
are compatible with Microsoft Exchange 2007 ActiveSync.

MailSite Fusion 9 continues to provide excellent integration with Microsoft
Outlook 2007 for email, calendar and contacts without requiring any
plug-ins. In addition MailSite Fusion 9 supports Mozilla Thunderbird,
Mozilla Lightning and Google Calendar. MailSite Fusion 9 includes the
Kaspersky anti-virus engine and the Mailshell anti-spam engine for
protection against viruses and malware.

For small businesses, MailSite Fusion SE 9 runs on low-cost 32 bit servers
and includes everything required for a messaging platform. MailSite Fusion
SE 9 does not require a dedicated server and can be administered by a
Windows administrator. With licensing prices less than 50% of Microsoft
Exchange 2007, small businesses now have a low-cost alternative.

For service providers, MailSite Fusion SP 9 is field-proven to scale to
over a million subscribers on a single cluster. This offers carriers and
hosting companies a low cost and brand-able messaging platform with the
opportunity for profit margins that are substantially higher than with
Hosted Exchange 2007.

“Adoption of mobile push email, calendar and contacts is just beginning to
take-off,” said David Ferris of Ferris Research. “The new Apple iPhone 2.0
will take ActiveSync beyond the large enterprise to the mass market and
MailSite is perfectly positioned to take advantage of this opportunity.”

“The new ActiveSync server in MailSite Fusion 9 just works,” said Jaime
Bolanos, IT Manager of Associated Foreign Exchange, a MailSite customer in
Encino, California. “By configuring your Windows Mobile smartphone with
your server name, user name and password, MailSite Fusion works just like
an Exchange 2007 server.”

“MailSite Fusion 9 is the most exciting release in the history of our
company,” said John Davies, President and CEO. “MailSite Fusion 9 offers
our customers the easiest and most comprehensive messaging platform for
wired and wireless users in the industry,” continued Davies.

MailSite Fusion 9 will be available in June 2008 from MailSite Software,
Inc. and from resellers around the world. MailSite Fusion SE 9 starts at
$495 per year for 20 users. Anti-spam and anti-virus subscriptions will be
available at additional cost. For more information visit:

About MailSite Software, Inc.

MailSite Software, Inc. has been providing secure email, calendar and
contact server software for carriers, telecoms, hosting providers, service
providers, enterprises and small businesses worldwide since 1995. MailSite
Software is based in California’s Silicon Valley with European offices in
London and Edinburgh, UK. MailSite Software has more than 2,000 customers
hosting more than 15 million mailboxes worldwide. These include service
providers such as AT&T, Verizon, eChalk, Koç.net and NetOne; enterprises
such as Teleflora, Encyclopædia Britannica, and MediaNews Group. MailSite
Software partners include J2 Global Communications, Enigma Health, Rockwell
Collins, Kaspersky and Mailshell. For more information visit: