Sendmail Partners With Commtouch to Combat Spam and Viruses at Zero-Hour; Sendmail Strengthens Mailstream Manager and Sentrion A

Sendmail Inc. and Commtouch (Nasdaq:CTCH), two leaders
in email infrastructure and security technology, announced today the
signing of a new OEM licensing agreement. Through this partnership,
Sendmail will offer its customers cutting edge spam filtering and
Zero-Hour(TM) virus protection services, based on Commtouch's
Recurrent Pattern Detection(TM) (RPD(TM)) technology.
   "With the worldwide growth of spam, and increasingly threatening
virus outbreaks, we need the most advanced technology to defend our
customers' email infrastructures," said Richard Kreysar, CEO,
Sendmail, Inc. "An especially concerning trend is the growing speed of
distribution. The most dangerous viruses are distributed before most
anti-virus products have a chance to update their signatures.
Commtouch's innovative, real-time detection approach to email
classification, combined with our Mailstream Manager and Sentrion
appliance adaptive policy framework, provides unmatched protection
from spam, phishing, viruses, spyware and other malware."
   The evolution of attacks has created a vulnerability gap for
business, government, and consumer email users. A Recent FBI Computer
Crime Survey finds that "9 out of 10 U.S. businesses suffered from a
computer virus, spyware or other online attacks in 2004 or 2005
despite widespread use of security software." Responses from a
cross-section of more than 2,000 public and private organizations
surveyed in four states reveal that while 98% of respondents used a
traditional anti-virus solution, nearly 84% still suffered an attack
within the last year, and 20% indicated they had experienced 20 or
more attacks.
   "The partnership with Sendmail is additional proof that
Commtouch's technology has become the choice of leaders. We are proud
to be working with such a recognized leader and innovator in email and
email security," said Gideon Mantel, Commtouch, CEO. "Sendmail's
top-of-the-line software and appliance solutions are a perfect
platform for Commtouch's RPD technology. Together, we believe we can
deliver the world's finest anti-spam and Zero-Hour virus protection
services to customers worldwide."
   Sendmail, which has over 4,500 global customers worldwide and
serves millions of mailboxes, will market Commtouch's RPD within the
Mailstream email security software family and Sentrion family of email
security appliances launched in 2005. Sendmail's customer base will
benefit from Commtouch's global detection network, which protects
enterprises, service providers and consumers in over 140 countries.
   Commtouch's RPD is a network-based technology that detects
patterns of massive outbreaks in email traffic to block spam and
email-born malware attacks within minutes or even seconds of their
distribution.
   The Sendmail products incorporating Commtouch RPD and Zero-Hour
technology will be available in March 2006. For further information,
visit Sendmail and Commtouch representatives in booth 1810 at RSA in
San Jose, or contact [e-mail] or [e-mail].

   About Sendmail

   Sendmail, Inc. is a global provider of enterprise solutions for
secure, dependable, and compliant messaging. Sendmail solutions help
organizations eliminate unwanted messages, effectively manage their
mail stream, and address regulatory compliance and corporate
governance requirements. Customers across 16 countries and the
majority of the Fortune 1000, rely on Sendmail for their end-to-end
email security and infrastructure needs: gateway security, secure
routing, policy management, internal and outbound mail management,
quarantine, and email access and storage. Sendmail is headquartered in
Emeryville, CA, with offices and distributors in Europe, Asia and
North America. Visit www.sendmail.com or call 1-87-SENDMAIL.

   About Commtouch

   Commtouch Software Ltd. (Nasdaq:CTCH) is dedicated to protecting
and preserving the integrity of the world's most important
communications tool -- email. Commtouch has 15 years of experience
developing messaging software, and is a global developer and provider
of proprietary anti-spam and Zero-Hour virus protection solutions.
Using core technologies including RPD Recurrent Pattern Detection, the
Commtouch Detection Center analyzes billions of email messages per
month to identify new spam and malware outbreaks within minutes of
their introduction into the Internet. Integrated by over 35 OEM
partners, Commtouch technology protects thousands of organizations,
with 35 million users in 130 countries. Commtouch is headquartered in
Netanya, Israel, and has a subsidiary in Mountain View, CA. For more
information, see: www.commtouch.com, including the Commtouch online
lab detailing spam statistics and charts.

   This press release contains forward-looking statements, including
projections about our business, within the meaning of Section 27A of
the Securities Act of 1933 and Section 21E of the Securities Exchange
Act of 1934. For example, statements in the future tense, and
statements including words such as "expect," "plan," "estimate,"
"anticipate," or "believe" are forward-looking statements. These
statements are based on information available to us at the time of the
release; we assume no obligation to update any of them. The statements
in this release are not guarantees of future performance and actual
results could differ materially from our current expectations as a
result of numerous factors, including business conditions and growth
or deterioration in the Internet market, commerce and the general
economy, both domestic as well as international; fewer than expected
new-partner relationships; fewer than expected license agreements
resulting from Commtouch's exclusive rights to market DCC; competitive
factors including pricing pressures; technological developments, and
products offered by competitors; the ability of our OEM partners to
successfully penetrate markets with products integrated with Commtouch
technology; a slower than expected acceptance rate for real time AV
solutions in general and the Commtouch Zero-Hour(TM) Virus Protection
product in particular; availability of qualified staff for expansion;
technological difficulties and resource constraints encountered in
developing new products, such as the Zero-Hour solution; and the
failure of Commtouch to meet The NASDAQ Capital Market's listing
standards in the future, as well as those risks described in the text
of this press release and the company's Annual Reports on Form 20-F
and reports on Form 6-K, which are available through www.sec.gov.

   Recurrent Pattern Detection, RPD and Zero-Hour are trademarks, and
Commtouch is a registered trademark, of Commtouch Software Ltd. U.S.
Patent No. 6,330,590 is owned by Commtouch.