SYBARI FILES REGISTRATION STATEMENT WITH THE SECURITIES AND EXCHANGE COMMISSION FOR INITIAL PUBLIC OFFERING

East Northport, NY―(May 17, 2004)― Sybari Software, Inc. announced today that it has filed a registration statement with the Securities and Exchange Commission for a proposed initial public offering of its common stock.

Sybari is a global provider of antivirus, anti-spam and content filtering security software products. Sybari’s server-based products are used in electronic messaging and collaboration environments to protect organizations from viruses, spam and the transmission of other forms of inappropriate content.

The underwriters for the proposed offering will be SG Cowen & Co., LLC, acting as sole book-running manager, and Wachovia Capital Markets, LLC and Raymond James & Associates, Inc., acting as co-managers for the proposed offering.

The number of shares to be offered and the price range for the offering have not yet been determined. All of the shares will be issued and sold by Sybari. A non-employee stockholder of Sybari may sell shares of common stock to cover the underwriters’ over-allotments, if any.

A registration statement relating to these securities has been filed with the Securities and Exchange Commission but has not yet become effective. These securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective. This press release shall not constitute an offer to sell or the solicitation of an offer to buy nor shall there be any sale of these securities in any state in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state.

A preliminary prospectus relating to these securities is not currently available. The proposed offering may be made only by means of a prospectus, a copy of which may be obtained, when available, from SG Cowen & Co., LLC at 1221 Avenue of the Americas, 6th Floor, New York, New York 10020 or through ADP by fax at (631) 254-7268.

Sybari is a registered trademark of Sybari Software, Inc.

Media Relations Contact:

Marcella P. Mazzucca
Sybari
Director, Global Marketing & Media Relations
Direct: 732.530.5418
Mobile: 631-816-8506
E-mail: marcella@sybari.com

Peggy de Lange
Solid Ground BV – Relations Publiques
Direct: : +31 (0) 23 533 40 99
E-mail: peggy@solidground.nl

Daniela Boers
Trait d’Union CM – Relations Presse
Direct:: + 33 (0)1 53 24 98 31
E-mail: daniela@traitdunioncm.com