Hi There is a bug in ispconfig 2.2.5, allways reproducible If you put "manual entries" below ;;;; MAKE MANUAL ENTRIES BELOW THIS LINE! ;;;; on "/root/ispconfig/isp/conf/pri.domain.master", EVERY time you make and save a single change to the site, those lines are appended to zone file. After some time of use, you can end with loooong zone files.