EXHIBIT 32.1

STATEMENT OF CHIEF EXECUTIVE OFFICER UNDER 18 U.S.C. SECTION 1350

I, Mark Ferrer, the chief executive officer of Critical Path, Inc. (the “Company”), certify for the purposes of section 1350 of chapter 63 of title 18 of the United States Code that, to my knowledge:

(i) the Quarterly Report of the Company on Form 10-Q for the quarterly period ended June 30, 2004 (the “Report”) fully complies with the requirements of section 13(a) of the Securities Exchange Act of 1934, and

(ii) the information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: August 9, 2004

/s/ MARK FERRER

Mark Ferrer

Chief Executive Officer