Hi.

I am about to write some custom courier mail filter app. (Thanks to Gordon for a extendable python framework!)

What I did not understand is, may a filter change the message's content?

Some older docs say that this may not be done, the current doc does not explicitly state this. I tried to do so and it works. The docs say, the filters are called one at a time, so there should be no problem with this.

So, is it safe to alter the message from a global courier filter?

The docs say: | The mail filter is free to judge the message's worthiness by reading its | contents and/or control file(s) [...] | The final verdict is rendered by writing back a result code on the same | socket.

Perhaps it could be written more clearly if modifying content is safe or not.

cu, Bernd