EXHIBIT 5.1




                   [ZIXIT CORPORATION LETTERHEAD APPEARS HERE]

                                  May 22, 2002


ZixIt Corporation
2711 North Haskell Avenue
Suite 2300, LB 36
Dallas, Texas 75204-2960

         Re: Registration Statement on Form S-3

Ladies and Gentlemen:

         I have acted as General Counsel to ZixIt Corporation, a Texas
corporation (the "Company"), in connection with the registration under the
Securities Act of 1933, as amended (the "Securities Act"), of 116,833 shares
(the "Shares") of the Company's common stock, $.01 par value per share. The
Shares were issued pursuant to that certain Common Stock Issuance Agreement,
effective March 28, 2002, between Tumbleweed Communications Corp. and the
Company (the "Agreement"). The Shares are being registered pursuant to a
registration statement on Form S-3 to be filed with the Securities and Exchange
Commission on or about May 24, 2002 (the "Registration Statement").

         This opinion is delivered in accordance with the requirements of Item
601(b)(5) of Regulation S-K under the Securities Act. In connection with this
opinion, I have examined such documents and records of the Company and such
statutes, regulations and other instruments and certificates as I have deemed
necessary or advisable for the purposes of this opinion. I have assumed that all
signatures on all documents presented to me are genuine, that all documents
submitted to me as originals are accurate and complete, and that all documents
submitted to me as copies are true and correct copies of the originals thereof.

         I have also relied upon such other certifications of public officials,
corporate agents and officers of the Company, and such other certifications with
respect to the accuracy of material factual matters contained therein which were
not independently established.

         Based on the foregoing, I am of the opinion that such Shares issued
pursuant to the Agreement were validly issued, fully paid and nonassessable upon
issuance. I consent to the use of this opinion as an exhibit to the Registration
Statement.

                                        Very truly yours,

                                        /s/ Ronald A. Woessner

                                        Ronald A. Woessner
                                        Senior Vice President, General Counsel
                                        and Secretary for ZixIt Corporation