Exhibit 10.18 Common Stock Purchase Agreement of Albert Koehler
July 12, 2007
701 North Post Oak Road, Suite 600
Houston, Texas 77024
Ladies and Gentlemen:
The undersigned (the “Investor”) is writing to advise you of the following terms and conditions under
which the Investor hereby offers to subscribe (the "Offer") for the securities of this offering which are offered by
Bluegate Corporation, a Nevada corporation (the "Company”). There is no placement agent for the offering as it
is being offered directly by management. The Company is issuing securities consisting of its Common Stock, par
value $.001 with warrants to acquire additional shares of the Company’s Common Stock, par value $.001
(“Warrants”) (collectively, the “Securities”) at $200,000 per Security. Each Security contains 400,000 shares of
Common Stock and a warrant to purchase 1,000,000 shares of Common Stock at $0.17 per share. The
undersigned understands that the Securities are being issued pursuant to the exemption from registration
requirements of the Securities Act of 1933, as amended (the “Act”), provided by Section 4(2) of the Act. As
such, the Common Stock, the Warrants, and the underlying shares of Common Stock into which the Warrants
may be converted (the “Underlying Shares”) are "restricted securities".
All proceeds received from subscribers for the Securities in the offering will be paid directly to the
Company against delivery by the Company of certificates representing the Common Stock and Warrants.
2. Subscription .
Subject to the terms and conditions hereinafter set forth in this Subscription Agreement, the
undersigned hereby offers to purchase the Securities as set forth in the Investor Signature Page attached hereto.
If the Offer is accepted by the Company, the Securities shall be paid for by the delivery of such
amount by wire transfer, check or money order payable to the order