emailsoap is a Sendmail Milter designed to alter email subject headers. Specifically, use it to look for offending words and replace them. Essentially washing email's mouth out with soap.
Use this tool if email is making it through to your users with offending language. Simple matching regular expressions can swap out the offending text with more mundane text.
For example, a quick matching rule can be defined to change a subject like "get your nasty stuff here" to "get your n**ty s****f here".
Developed in C and maintained on RedHat Linux 8.0.
emailsoap is copyright © 2004 by The Press-Enterpirse. emailsoap is distributed under the terms of GNU General Public License.
This project was born out of the need to deal with spam. The company I work at receives a lot of spam. Although we use spam detection to label the Subject: with "** SPAM **", the original subject is still there. Many of the porn spam uses volatile language that can be found offensive to some. Thus this mail filter was created.
Go to the SourceForge project page to download the source. There you will find the tarball which I've successfully compiled on RedHat 8.0.
For questions or suggestions about emailsoap, contact the author, Randy McEoin at rmceoin@pe.com.