Exhibit 12.1


         CERTIFICATIONS PURSUANT TO EXCHANGE ACT RULE 13a-14a or 15d-14a

I, Gideon Mantel, certify that:

1. I have reviewed this annual report on Form 20-F of Commtouch Software Ltd.;

2.  Based on my  knowledge,  this  annual  report  does not  contain  any untrue
statement of a material fact or omit to state a material fact  necessary to make
the statements made, in light of the  circumstances  under which such statements
were made, not misleading with respect to the period covered by this report;

3.  Based  on my  knowledge,  the  financial  statements,  and  other  financial
information  included  in this annual  report,  fairly  present in all  material
respects the financial  condition,  results of operations  and cash flows of the
registrant as of, and for, the periods presented in this report;

4. The Company's other certifying officer and I are responsible for establishing
and maintaining  disclosure  controls and procedures (as defined in Exchange Act
Rules 13a-15(e) and 15d-15(e)) for the Company and have:

     a)  Designed  such  disclosure  controls  and  procedures,  or caused  such
     disclosure controls and procedures to be designed under our supervision, to
     ensure that  material  information  relating to the Company,  including its
     consolidated  subsidiaries,  is made  known to us by  others  within  those
     entities,  particularly  during the  period in which  this  report is being
     prepared;

     b) Evaluated the  effectiveness  of the Company's  disclosure  controls and
     procedures  and  presented  in  this  report  our  conclusions   about  the
     effectiveness of the disclosure  controls and procedures,  as of the end of
     the period covered by this report based on such evaluation report; and

     c) Disclosed in this report any change in the  Company's  internal  control
     over  financial  reporting  that occurred  during the period covered by the
     annual report that has  materially  affected,  or is  reasonably  likely to
     materially affect, the Company's internal control over financial reporting;
     and

5. The Company's other  certifying  officer and I have  disclosed,  based on our
most recent  evaluation of internal  control over  financial  reporting,  to the
Company's  auditors and the audit  committee of the Company's board of directors
(or persons performing the equivalent function):

     a) All significant  deficiencies  and material  weaknesses in the design or
     operation of internal control over financial reporting which are reasonably
     likely to  adversely  affect the  Company's  ability  to  record,  process,
     summarize and report financial information; and

     b) Any fraud,  whether or not material,  that involves  management or other
     employees who have a significant  role in the  Company's  internal  control
     over financial reporting; and

6. The registrant's other certifying officer and I have indicated in this annual
report whether or not there were significant  changes in internal controls or in
other factors that could  significantly  affect internal controls  subsequent to
the date of our most recent  evaluation,  including any corrective  actions with
regard to significant deficiencies and material weaknesses.

Date: June 18, 2004

                                               /s/Gideon Mantel
                                            ----------------------
                                                 Gideon Mantel
                                            Chief Executive Officer