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 Annual Report of the Company on Form 10-K/A for the year ended December
31, 2003 (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: April 16, 2004                     /s/ Mark Ferrer
                                   ------------------------------
                                           Mark Ferrer
                                     Chief Executive Officer

A signed original of this written statement required by 18 U.S.C. Section 1350
has been provided to Critical Path, Inc. and will be retained by Critical Path,
Inc. and furnished to the Securities and Exchange Commission or its staff upon
request.

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(1) The material contained in this Exhibit 32.1 is not deemed "filed" with the
SEC and is not to be incorporated by reference into any filing of the Company
under the Securities Act of 1933 or the Securities Exchange Act of 1934, whether
made before or after the date hereof and irrespective of any general
incorporation language contained in such filing.