Internet postage vendor E-Stamp Corp has filled in some of the blanks on its impending initial public offering in an amended registration statement with the Securities and Exchange Commission. The San Mateo, California-based company plans to sell 6.5 million shares in a range of $12 to $14 each, the filing said.

In that range, the company is looking to net about $77m, which it will use to cover sales and marketing expenses, expand its corporate infrastructure, and other general corporate purposes. The underwriters – Donaldson, Lufkin & Jenrette, Banc of America Securities LLC, Deutsche Banc Alex Brown, and DLJdirect Inc – have been granted a further 975,000 shares to cover over- allotments.