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The LA Fox Developer Newsletter
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June
1998
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Spam
Alert
(Con't from page 5)
multiple users (a common characteristic of spam).
this allows a site to allow relaying only for hosts for which they are a valid MX server.
lookup failures. This allows better rejection of SMTP envelope senders that have invalid host names. Allow message rejection on the basis of header contents. For example, messages with invalid Message-Id:
headers or a “To: friend@public.com” header can be rejected.
Limit the size of HELO/EHLO parameter to prevent
spammers from hiding their connection information in Received: headers.
accepted and then dropped.
A complete technical description
of changes in sendmail 8.9 is at
http://www.sendmail.org.
If you’re interested in joining the spam-fight and/or just want to find out more, try these sights:
http://www.ao.net/waytosuccess/nospam.html
http://www.ybecker.net/pink/ http://www.ao.net/waytosuccess/newbie.html http://www.ybecker.net/ http://www.senate.gov/~murkowski/commercialemail/ http://www.ybecker.net/murkowski/contact.html http://healines.yahoo.com/Full_Coverage/Tech/
Spam_Wars/ http://kryten.eng.monash.edu.au/gspam.html http://www.stopspam.org/ http://spam.ohww.norman.ok.us/notice.htm http://www.ecofuture.org/ecofuture/jnkmail.html
(Contributors to this article include the fine folks at CAUCE
(http://www.cauce.org),
Russell Campbell of the Atlanta FUG, and yours truly, Barry R. Lee. Let’s all fight the fight.]
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With the beta version of Visual FoxPro 6.0, Professional Edition, Microsoft has successfully morphed the product from its xBase roots of some 14 years ago into an integrated development platform that today is ideal for traditional client/server projects, Web applications, and the creation of database-related components. Visual FoxPro developers and those seeking a solid development solution for enterprise-grade projects should consider the production release, which is due this summer.
As a development platform, the added support for transaction management, Web applications, the graphical component gallery, prebuilt classes, and more, places Visual FoxPro in serious contention with its competitors, such as PowerBuilder, from Sybase, and Delphi, from Inprise (formerly Borland).
Visual FoxPro has always been strong in the area of database development, and the additions to this area also stiffen competition for rivals such as Oracle’s Developer/2000, which I will review soon.
Microsoft still needs to do some tweaking to this version of Visual FoxPro before it is ready to go out the door. During my tests I found several beta instabilities.
For example, just after installation in my Windows NT 4.0 environments, I received a plethora of strange error messages. I also was disappointed at two things I found when I looked at Microsoft’s new Active Document support for Visual FoxPro. The Active Document feature lets developers run Visual FoxPro applications inside a Web browser.
During my Active Document tests, some of my applications executed flawlessly in the browser and others appeared only partially. Also, the Active Document feature supports only Microsoft’s Internet Explorer.
Power and productivity
Beta woes aside, Visual FoxPro is as strong as ever when it comes to handling data in applications. This version adds some new power by offering integration with Microsoft’s Transaction Server and support for OLE for DB
—
enabling access to relational and nonrelational data stores. Furthermore, changes to data-formatting features offer complete compliance for year- 2000 projects.
Notable wizards
Notable in this version are several new wizards and more than
100 prebuilt classes that can be easily reused. In particular, I
liked both the Application Wizard and the Application Builder.
The former helped me quickly build skeleton frameworks for
(Con’t, page 8)
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