On 25.4.2012, at 16.29, Robert Schetterer wrote: > master: service(lmtp): child 31952 killed with signal 11 (core not dumped) Can you get a gdb backtrace? Might be a bit difficult to get a core dump from lmtp, but you should be able to attach gdb into it: service lmtp { process_min_avail = 1 } gdb -p `pidof lmtp` cont <make lmtp crash> bt full