When you have installed SQL Server 2005 into your Windows (the database engine, now surpassed by the new great version of MS SQL 2008-2012) then you have unintentionally installed Just-In-Time debugger too. “JIT” causes a lot of problems – no longer work applications that previously ran without problems, there are various error message even when you are viewing web pages. JIT is simply set as the default application for trapping exceptions, which in conjunction with DEP (data execution prevention) creates a “firewall” for the elderly functional applications. One solution of this problem is quite simple: Read more ›
In case that Windows startup screen says “specified file is missing or corrupt: \WINDOWS\system32\config\SYSTEM” does not yet need to panic and reinstall Windows. For some reason was damaged file WINDOWS\system32\config\SYSTEM (no, it is not a bug – it is truly a file without an extension, not a directory). Fortunately, Windows can create a variety of backup critical system files and have not forgotten on the abovementioned file SYSTEM.
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Occasionally we need to validate e-mail addresses without send a message to the recipient and wait for answer. For example, we can verify whether an email address given via a simple web form, is not a fake. The principle of such validation involves several steps:
- verification of the existence domain (what is behind the sign)
- verification of the existence MX record for the domain
- connection to the SMTP server according to the MX record
- communication is established according to the SMTP protocol and check the server’s response to the command RcptTo