[MM3-users] Re: adding personalized email header/content in mailman 3

Thanks, but still get the same KeyError: 'customheader'. I don't know python so it seems like waste of time trying to make it work without understanding much.

Still, I've managed it all to work to my needs directly modifying Decorate.py as I did in Mailman 2 (simply copying existing code didn't work as it seems like multipart message parts are now binary objects so had to add extra str conversion, but in the end it seems to be working fine).

Thanks for your help anyway!