EXHIBIT 99.1

                 CMGI Sells All of its Equity and Debt Ownership
                             Interests in NaviSite

ANDOVER, Mass., Sept. 11, 2002--CMGI, Inc. (Nasdaq: CMGI) today announced that
it has sold all of its shares of common stock and debt interests in NaviSite,
Inc. (Nasdaq: NAVI) to ClearBlue Technologies, Inc., a manager of a nationwide,
distributed portfolio of carrier-neutral data centers in key U.S. cities. Under
the terms of the agreement, CMGI received a minority interest in ClearBlue
Technologies.

Tom Oberdorf, Chief Financial Officer of CMGI stated: "We continue the momentum
of strategically refocusing CMGI on a core set of business sectors where we can
be market leaders. Our decision to sell our position in NaviSite, our sole
infrastructure business, is another step in paring our core businesses,
consistent with the plan discussed in June. The combination of recent actions -
the acquisition of iLogistix, the amendment of the stadium sponsorship agreement
and the divestitures of Engage and NaviSite - demonstrate progress in the
execution of our strategic plan and focused pursuit of profitability."

As a result of this transaction, the financial results of NaviSite, including
its net revenues, pro forma operating losses, and cash and cash equivalents
balances, will no longer be included in CMGI's consolidated financial
statements.

About CMGI and @Ventures

CMGI, Inc. (Nasdaq: CMGI) is comprised of CMGI operating businesses and
investments made through its venture capital affiliate, @Ventures. CMGI
companies span a range of vertical market segments including e-business and
fulfillment and enterprise software and services, and include AltaVista,
Equilibrium, ProvisionSoft, SalesLink, Tallan, uBid and Yesmail.

CMGI's corporate headquarters is located at 100 Brickstone Square, Andover, MA
01810. @Ventures has offices there, as well as at 3000 Alpine Road, Menlo Park,
CA 94028. For additional information, see www.cmgi.com and www.ventures.com.

This release contains forward-looking statements which address a variety of
subjects including, for example, the expected effects of the sale of CMGI's
equity and debt ownership interests in NaviSite on CMGI's financial condition
and results of operations and the expected benefits of CMGI's continuing
restructuring efforts. The following important factors and uncertainties, among
others, could cause actual results to differ materially from those described in
these forward-looking statements: CMGI's success is dependent upon its ability
to integrate its operating companies in accordance with its business strategy;
CMGI's success, including its ability to decrease its cash burn rate, improve
its cash position, grow its businesses and revenues and reach profitability,
depends on its ability to execute on its business strategy and the continued and
increased demand for and market acceptance of CMGI's and its operating
companies' products, services and web sites and the Internet in general; CMGI
may experience difficulties integrating technologies, operations and personnel
in accordance with its business strategy; and increased competition



and technological changes in the markets in which CMGI competes. For detailed
information about factors that could cause actual results to differ materially
from those described in the forward-looking statements, please refer to CMGI's
filings with the Securities and Exchange Commission, including CMGI's most
recent Quarterly Report on Form 10-Q. Forward-looking statements represent
management's current expectations and are inherently uncertain. We do not
undertake any obligation to update forward-looking statements made by us.

_________________
Contact:

For Media Inquiries:

         Kimberly Kriger
         Kekst and Company
         212-521-4862

For Investor Inquiries:

         Thomas Oberdorf
         Chief Financial Officer, CMGI, Inc.
         ir@cmgi.com