The MailWasher Server Open Source is released under both the GNU General Public License (GPL) and a variation of the Mozilla Public License 1.1 (Firetrust Public License - FPL).

General Public License - GPL

Firetrust Public License - FPL

Software License FAQ

1) What is the variation to the Mozilla Public License?

The Mozilla license modifications relate to the following:

All copies of the Covered Code must include on each user interface screen:

1. the "powered by Firetrust" logo and
2. the Firetrust copyright notice

in the same form as they appear in the distribution. See Exhibit B of the FPL for more details.

2) Why are you using a dual license?

Dual licensing of the MailWasher Server source code provides open and free access to the technology both for the GPL community and for other developers or companies that cannot use the GPL. Having our code licensed under GPL makes it possible for users to use it alongside or combine it with other GPL licensed code and therefore further the copyleft principles that are intrinsic to these licenses. Having our code licensed uder the FPL enables users to use our code in combination with or alongside code that is licensed under another license (even proprietary code) as long as one respects the license conditions of the FPL (most importantly, that all original or changed source code that has been obtained under the FPL needs to be made available upon (re-)distribution.) We feel that there are a number of situations where the combination of open-source code with proprietary code is useful and/or necessary, and by licensing our code under the FPL, we want to make such use possible. Through the combined use of GPL and FPL, developers will have a high degree of freedom yet compatibility and interoperability will be preserved.

3) If I contribute to this project what do I have to do about licensing?

All contributions to the source code will require that the code is automatically available under both the GPL and the FPL. Firetrust asks that developers fill out the Contributor Agreement so that the copyright is unified. The Contributors Agreement ensures that Firetrust can defend license violations if necessary. You only need to fill out the Contributor Agreement once.

4) How can I use this licensed code?

All code licensed under this model can be used and distributed by anyone as long as they follow the conditions of one of the two licenses. This means that to use the code, the user needs to pick one of the licenses and act according to this one license only (e.g. the user can choose to use the code according to the Conditions of the FPL or the conditions of the GPL according to whatever best fits their situation/needs). The 'dual license' approach does not mean that users can combine parts of the two licenses.