Svcheck -- A CGI based Third Party Relay Checker --

Svcheck is a CGI program which checks a third party relay or an open relay by connecting to a target SMTP server. Since Svcheck tries to relay E-mail more than 20 patterns, the users can investigate weakness of their servers widely. Svcheck is easy to use. All the users have to do is input a target hostname and push the check button.

Svcheck also supports localized messages based on a message catalog (IEEE Std 1003.1-2001 aka POSIX.1). The users can use Svcheck in their mother tongue. Since Svcheck automatically select a language of each message by "Accept-Language:" field in HTTP request, the users transparently see Svcheck web page in their mother tongue. We have already made the Japanese message catalog and the English message catalog. Your contribution for language supports are welcome.

This program is developed on FreeBSD 5.x and some FreeBSD specific functions, such as arc4random, are used. However, these functions might be replaced easily and the providers who use other operating systems can use this program by little changes.

You can try this program in http://www.rbl.jp/.

Content

History

First version of Svcheck program appeared in March 15th, 2002. At this time, Svcheck is a command line program whose argument is a target hostname. A CGI version appeared in March 16th, 2002. Supports localized messages, such as Japanese, in March 17th, 2002.
All programs are refactored in May 7th, 2004. Source codes became public in January 21th, 2005.

Authors

License

The compilation of software known as Svcheck is distributed under the following terms:

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.