Exhibit 5.       Opinion of Jeffrey D. Adelman

                                July 17, 2001

                        j2 Global Communications, Inc.
                           6922 Hollywood Boulevard
                                   Suite 800
                          Hollywood, California 90028


Re:  j2 Global Communications, Inc. (the "Company")


Ladies and Gentlemen:

          I have acted as Counsel to the Company in connection with the
registration of 696,250 shares of the Company's common stock, par value $0.01
per share (the "Shares"), under the Securities Act of 1933, as amended
("Securities Act"), as described in the registration statement on Form S-8 (File
No. 333-55402) filed with the United States Securities and Exchange Commission
(the "Securities and Exchange Commission") on February 12, 2001, as amended by
the Form S-8/A filed with the Securities and Exchange Commission on or about the
date hereof (the "Registration Statement").

          For the purposes of giving this opinion, I have examined the following
documents:

          (1)  a copy of the final form of the Registration Statement as
               provided to me by the Company on the day preceding the date of
               this letter;

          (2)  a copy of the Company's Second Amended and Restated 1997 Stock
               Option Plan (the "Plan");

          (3)  a copy of certified minutes of the Company's annual meeting of
               shareholders held on November 29, 2000 and a copy of a written
               consent of the members of the Company's board of directors dated
               July 12, 2000 approving, inter alia, increasing the number of
               shares eligible for issuance under the Plan to 2,000,000; and

          (4)  a copy of certified minutes of a meeting of the Company's board
               of directors held on May 7, 2001 approving, inter alia, an
               amendment to the Plan to permit the issuance of restricted stock
               under the Plan.

I have also examined and relied as to factual matters upon the originals, or
copies certified or otherwise identified to my satisfaction, of the Bylaws of
the Company, certificates of public officials, certificates of officers of the
Company, certain agreements to which the Company is a party and such other
records, documents, certificates and instruments, and have made such other
investigations, as in my judgment are necessary or appropriate to enable me to
render the opinions expressed below.

          I have assumed that (i) the minutes of meetings and written consents
referred to herein contain full and accurate records of resolutions passed in
meetings duly convened and held, or written consents duly executed and adopted,
in accordance with the Bylaws of the Company; and that such resolutions


have not been amended or rescinded and are in full force and effect, (ii) there
is no provision of the law of any jurisdiction, other than Delaware, which would
have any implication in relation to the opinion expressed herein, (iii) all
options granted pursuant to the Plan will be exercisable at a price at least
equal to the par value of the Shares, (iv) the Shares fall within the existing
authorized share capital of the Company, and (v) no resolution has been passed
by the shareholders of the Company to limit or otherwise fetter the powers
granted to the directors of the Company by the Bylaws of the Company to issue
any unissued shares of the Company on such terms and conditions as they may
determine.

     I am licensed to practice law only in the State of Michigan. However, in
connection with this opinion I have solely investigated the General Corporation
Law of the State of Delaware, and not any other laws of the State of Delaware or
any other jurisdiction. Nothing in this opinion should be or shall be construed
otherwise. This opinion is limited solely to the laws of the General Corporation
Law of the State of Delaware. Except as mentioned below, this opinion is issued
solely for your benefit and is not to be relied upon by any other person, firm
or entity or in respect of any other matter.

     On the basis of and subject to the foregoing, I am of the opinion that the
Shares have been duly authorized, and when issued, delivered and paid for in the
manner described in the Plan, will be validly issued, fully paid and non-
assessable.

     I hereby consent to the filing of this opinion as an exhibit to the
Registration Statement. In giving such consent I do not thereby admit that I
come within the category of persons whose consent is required under Section 7 of
the Securities Act, or the Rules and Regulations of the Securities and Exchange
Commission thereunder.


                    Very truly yours,

                    /s/ Jeffrey D. Adelman
                    ----------------------
                    Jeffrey D. Adelman
                    Vice President, General Counsel and Secretary
                    j2 Global Communications, Inc.