Exhibit 4.22

Margarette Lee                                        September 6, 2002
Young Woo & Assoc., LLC
141 Fifth Avenue
New York, NY 10010

Re: Early Termination Agreement

Dear Margarette:

Further to our discussion  from today,  this is to memorialize  the agreement we
have  reached  to  terminate  the  Agreement  of  Sublease  between  Young Woo &
Associates and Commtouch dated October 1, 1999:

     1.  Commtouch shall pay Young Woo the sum of $55,613.90.  Of that amount, a
         payment of $24,720 shall be made by way of Young Woo's retention of the
         security deposit it holds in that amount.

     2.  Of the remaining amount of $30,893.90, upon signature of this agreement
         by Young  Woo,  Commtouch  shall  either  wire funds or send a check by
         Federal Express to Young Woo in the sum of $13,200. The transference of
         the $13,200 will occur on Tuesday,  September  10, 2002.  The remainder
         totaling  $17,693.90 shall be made by wire transfer or check on October
         1, 2002.  To secure the  payment of this  remaining  amount,  Commtouch
         shall cause its parent company,  Commtouch  Software Ltd., to sign on a
         promissory note in the amount of $17,693.90.

     3.  Young Woo shall  immediately send to Commtouch by overnight  delivery a
         check it  possesses  from  Treasurace  for deposit by  Commtouch in the
         amount of $8240.

     4.  Young  Woo  shall be  transferred  title  to the  items  listed  on the
         attached  list,  which we  understand  to be located  currently  on the
         leasehold premises.

     5.  Upon execution of the above, the sublease,  including parent guarantee,
         is terminated  and each of the parties hereto waives any and all claims
         of any nature against the other party, including all related affiliates
         and  representatives.  Without derogating from the effectiveness of the
         above release, a more formal and detailed release is contemplated.

Margarette,  I appreciate your patience and courtesy  throughout this oftentimes
difficult  negotiation.  Please  sign  below and  return a signed  copy to us in
evidence of Young Woo's agreement to the above.

Regards,
/s/Gary Davis
Gary Davis
General Counsel

We agree to the above:              ______________     ________________________
                                    Commtouch Inc.     Young Woo & Assoc., LLC