switching between tabs changes custom rules
I tried the following HowTo: http://www.faqforge.com/linux/controlpanels/ispconfig3/ispconfig-3-how-to-send-copys-of-incoming-emails-to-other-mailboxes/
but when I click on the mail filter tab and then on the custom rules tab some code generates too much backslash characters. Due to these additional backslash characters the syntax of the mailfilter is invalid. I hope you can reproduce this behaviour and fix it.