Ipswitch Inc has effectively beaten Microsoft Corp to the punch by providing Internet access for its NT-based electronic-mail server. The Lexington, Massachusetts company has released an add- on called Web Messaging for its POP3-compliant IMail Server for NT. The add-on enables users to access their mail boxes from any browser. We’ve even beaten Microsoft to market, bragged Ipswitch president Robert Greene – the latest version of Microsoft Exchange, just released to beta, adds similar capabilities. As an added fillip for Internet service providers, Ipswitch has added an on-line advertising feature. The module enables service providers to pump as many as 20 advertisements, changing at 30-second intervals, down the pipe to their customer’s browsers when they log on to check their mail.